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数字和代数

基本代数 - 表达式的展开和因式分解

Q.01

'展开式的通用项是\n\\[\\frac{6!}{p!q!r!} \\cdot a^{p} \\cdot(2 b)^{q} \\cdot(3 c)^{r}=\\frac{6!}{p!q!r!} \\cdot 2^{q} \\cdot 3^{r} \\cdot a^{p} b^{q} c^{r}\\]\n其中 \ \\quad p+q+r=6, p \\geqq 0, q \\geqq 0, r \\geqq 0 \\n(a) \ a^{3} b^{2} c \ 项的系数是, 当 \ p=3, q=2, r=1 \ 时为\n\\\frac{6!}{3!2!1!} \\cdot 2^{2} \\cdot 3^{1}=720\\n(b) \ a^{4} c^{2} \ 项的系数是, 当 \ p=4, q=0, r=2 \ 时为\n\\\frac{6!}{4!0!2!} \\cdot 2^{0} \\cdot 3^{2}=135\'

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Q.02

'求解以下展开式中指定项的系数。(1) (2x-y-3z)^6 [xy^3 z^2] (2) (1+x+x^2)^10 [x^4] (3) (x+1/x^2+1)^5 [常数项]'

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Q.03

'请找出以下表达式中特定项的通项公式和系数。'

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Q.04

'(1) \\((x+2-i)(x+2+i)\\)(2) \\((3 x-17)(2 x-9)\\)'

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Q.05

'请解决以下方程:'

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Q.06

'展开表达式 \\( (a+b+c)^{n} \\) 的一般项是\n\\\frac{n!}{p!q!r!} \\alpha^{p} b^{q} c^{r}\\n其中 \ p+q+r=n \'

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Q.07

'(2) (解 1) α^{3}+β^{3}+γ^{3}=(α+β+γ){α^{2}+β^{2}+γ^{2}-(αβ+βγ+γα)}+3αβγ =2 \\cdot(4-0)+3\\cdot4=20'

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Q.08

'(2) 展开式的通项是 frac10!p!q!r!cdot1pcdotxqcdotleft(x2right)r=frac10!p!q!r!cdotxq+2r\\frac{10!}{p!q!r!} \\cdot 1^{p} \\cdot x^{q} \\cdot\\left(x^{2}\\right)^{r}=\\frac{10!}{p!q!r!} \\cdot x^{q+2 r}\n其中 p+q+r=10quadcdotscdots(1),pgeqq0,qgeqq0,rgeqq0p+q+r=10 \\quad\\cdots\\cdots (1), p \\geqq 0, q \\geqq 0, r \\geqq 0。\nx4x^{4} 的项是在 q+2r=4q+2 r=4 时,即 q=42rq=4-2r。'

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Q.09

'求出数列 \ \\left\\{a_{n}\\right\\} \ 的通项公式。'

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Q.10

'展开以下多项式。'

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Q.11

'和符号 \ \\Sigma \, \ \\Sigma \ 的性质\n和符号 \ \\Sigma \\n\\n\\sum_{k=1}^{n} a_{k}=a_{1}+a_{2}+a_{3}+\\cdots \\cdots+a_{n}\n\\n这个性质中的 \ p, q \ 是与 \ k \ 无关的常数。\n\\[\n\\sum_{k=1}^{n}\\left(p a_{k}+q b_{k}\\right)=p \\sum_{k=1}^{n} a_{k}+q \\sum_{k=1}^{n} b_{k}\n\\]\n数列和公式中的 \ c, r \ 是与 \ n \ 无关的常数。\n\\[\n\egin{aligned}\n\\sum_{k=1}^{n} c & =n c \\\\ \n特别是 \\\\ \n\\sum_{k=1}^{n} 1=n \\\\ \n\\sum_{k=1}^{n} k & =\\frac{1}{2} n(n+1) \\\\ \n\\sum_{k=1}^{n} k^{2} & =\\frac{1}{6} n(n+1)(2 n+1) \\\\ \n\\sum_{k=1}^{n} k^{3} & =\\left\\{\\frac{1}{2} n(n+1)\\right\\}^{2} \\\\ \n\\sum_{k=1}^{n} r^{k-1} & =\\frac{1-r^{n}}{1-r} \\\\( r \\neq 1) \n\\end{aligned}\\]\n'

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Q.12

'二项式定理的应用问题'

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Q.13

'(A + B)(A - B)'

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Q.14

'(1) 6x² + 3 (2) −x⁸ + 3x³ − 1 (3) 2(x² + 1)'

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Q.15

'将给定文本翻译成多种语言。'

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Q.16

'(A + B)的平方加(A - B)的平方'

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Q.17

'请简化以下连分数:\n\\n\\frac{1}{1+\\frac{1}{1+\\frac{1}{x+1}}}\n\'

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Q.18

'(3) (2)求得的圆方程展开整理后为:x^2 - mx + y^2 - (m^2 + 2)y = 0。将y = x^2代入得x^2 - mx + x^4 - (m^2 + 2)x^2 = 0,即x(x + m)(x^2 - mx - 1) = 0。因此x = 0, -m, α, β。因此,抛物线y = x^2和(2)求得的圆A、B、O除外没有其他共有点的充要条件是x = -m是方程x(x^2 - mx - 1) = 0的根。'

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Q.19

'请在复数范围内因式分解以下二次方程:\n1. x^{2}+4 x+5\n2. 6 x^{2}-61 x+153'

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Q.20

'(2) 1 + 3x + 5x^{2} + ... + (2n - 1)x^{n - 1}'

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Q.21

'将给定文本翻译成多种语言。'

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Q.22

'(1) (x2)(x2+x+2)(x-2)(x^{2}+x+2)\n(2) (x+1)(x+2)(x3)(x+1)(x+2)(x-3)\n(3) (x1)2(x2+2x+3)(x-1)^{2}(x^{2}+2x+3)\n(4) (x+1)(x3)(x2+2)(x+1)(x-3)(x^{2}+2)\n(5) (3x+1)(4x23x+1)(3x+1)(4x^{2}-3x+1)\n(6) (x1)(2x+1)(x2+x1)(x-1)(2x+1)(x^{2}+x-1)'

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Q.23

'求P(x)=x³-4x²+x-7在x=-2時的餘數'

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Q.24

'(1) 由于解为 \ \\alpha, \eta \,得到'

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Q.25

'将P(x)除以(x+1)^{2}(x-2),商为Q(x),余数为R(x),则成立以下等式。'

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Q.26

'(2)\\n\\\\(\\n\\\egin{aligned}\\nS & =1+3 x+5 x^{2}+\\\\cdots \\\\cdots+(2 n-1) x^{n-1} \\\\\\nx S & =\\\\quad x+3 x^{2}+\\\\cdots \\\\cdots+(2 n-3) x^{n-1}+(2 n-1) x^{n}\\n\\end{aligned}\\n\\\\)\\n\\n边边引くと\\\\( (1-x) S=1+2\\left(x+x^{2}+\\\\cdots \\\\cdots+x^{n-1}\\right)-(2 n-1) x^{n} \\)\\n\\nよって, \\\\x \\neq 1 \\\\ のとき\\\\(\\n\\\egin{aligned}\\n(1-x) S & =1+2 \\\\cdot \\\\frac{x\\left(1-x^{n-1}\\right)}{1-x}-(2 n-1) x^{n} \\\\\n& =\\\\frac{1-x+2\\left(x-x^{n}\\right)-(2 n-1) x^{n}(1-x)}{1-x} \\\\\n& =\\\\frac{1+x-(2 n+1) x^{n}+(2 n-1) x^{n+1}}{1-x}\\n\\end{aligned}\\n\\\\)\\n\\nゆえに \\\\ S=\\\\frac{1+x-(2 n+1) x^{n}+(2 n-1) x^{n+1}}{(1-x)^{2}} \\\\n\\\\( x=1 \\text{ のとき } \\quad \egin{aligned}\\nS & =1+3+5+\\\\cdots \\\\cdots+(2 n-1)=\\\\sum_{k=1}^{n}(2 k-1) \\\\\n& =2 \\\\cdot \\\\frac{1}{2} n(n+1)-n=n^{2}\\n\\end{aligned}\\n\\)'

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Q.27

'确定常数a、b、c、d的值,使等式( x + a y - 3)(2 x - 3 y + b) = 2 x^{2} + c x y - 6 y^{2} - 4 x + d y - 6成为关于x、y的恒等式。'

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Q.28

'\\[ 3(a x+2 b y)-(a+2 b)(x+2 y) \\]\n\\[=3 a x+6 b y-(a x+2 a y+2 b x+4 b y) \\]\n\\[=2(a x-a y-b x+b y) \\]\n\\[=2\\{ a(x-y)-b(x-y) \\} \\]\n\\[=2(a-b)(x-y) \\]\n\ a>b, x>y 所以, a-b>0, x-y>0 \\n\\[2(a-b)(x-y)>0 \\]\n\因此 \\n\\[(a+2 b)(x+2 y)<3(a x+2 b y) \\]'

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Q.29

'另 x^{3/2} + x^{-3/2} = (x^{1/2} + x^{-1/2})^3 - 3x^{1/2}x^{-1/2}(x^{1/2} + x^{-1/2})'

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Q.30

'(A - B)(A^2 + AB + B^2)'

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Q.31

'求解给定展开式中指定项的系数。(1) (2 x+3 y)^{4} [x^{2} y^{2}] (2) (3 a-2 b)^{5} [a^{2} b^{3}]'

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Q.32

'求解展开式的通项表达式。'

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Q.33

'设f(y)=y2+ya9f(y)=y^{2}+y-a-9,则关于轴的情况为3<\x0crac12<3-3<-\x0crac{1}{2}<3。由f(3)>0f(3)>0可得a<3a<3,且f(3)>0f(-3)>0可得a<3a<-3。综上得到\x0crac374<a<3-\x0crac{37}{4}<a<-3。'

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Q.34

'练习问题:求展开式中的x₁^p, x₂^p, ..., xᵣ^p的系数。'

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Q.35

'使用二项式定理展开(a+b)ⁿ。'

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Q.36

'数学 I\n267\n\\[\egin{aligned} y_{1}+y_{2} & =\\triangle \\mathrm{OAP}-\\int_{0}^{1}(-3x^{2}+3)dx+2y_{1} \\& =\\frac{1}{2} \\cdot 1 \\cdot 3p+3 \\int_{0}^{1}(x^{2}-1)dx+2 \\cdot \\frac{1}{2}(2-p)^{3} \\& =\\frac{3}{2}p+3\\left[\\frac{x^{3}}{3}-x\\right]_{0}^{1}+(2-p)^{3} \\& =\\frac{3}{2}p-2+(2-p)^{3} \\& =-p^{3}+6p^{2}-\\frac{21}{2}p+6 \\end{aligned}\\]'

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Q.37

'(2)给定方程组的解为 \ \\alpha, \eta \ ,因此'

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Q.38

'练习79册302页y = a x ^(3)-2 x上的点(t,a t3-2 t)和原点的距离的平方为t ^(2)+(a t3- 2 t) ^(2)=a ^(2)t6-4 a t4+5 t2'

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Q.39

'请说明使得上述等式为0的条件。'

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Q.40

'对于实数t,考虑两点P(t, t^{2})和Q(t+1, (t+1)^{2})。'

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Q.41

'(2) 由 f(a)=f(a+1) 推导出 a^{3}-3 a=(a+1)^{3}-3(a+1)'

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Q.42

'求出展开式中指定项的系数。(1) (x^2+2y)^5 [x^4 y^3] (2) (x^2-2/x)^6 [x^6, 常数项]'

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Q.43

'已知 19x^{3} 的系数为1的3次方程式Q(x)除以x-1的余数为-1,除以x-2的余数为8。'

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Q.44

'关于序列 \ \\{a_{n}\\} \,其中总和从第1项到第n项为 \ S_{n}=2 n^{2}-n \,请回答以下问题:\n1. 求一般项 \ a_{n} \。\n2. 求和 \ a_{1}+a_{3}+a_{5}+ \\ldots \\ldots+a_{2 n-1} \。'

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Q.45

''

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Q.46

'解决以下方程式。'

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Q.47

'请检查以下等式是否恒等:\n(1) (x-1)^{2}=x^{2}+1\n(2) (a+b)^{2}+(a-b)^{2}=2(a^{2}+b^{2})\n(3) \\frac{2 x+1}{2 x-1} \\times \\frac{4 x^{2}-1}{(2 x+1)^{2}}=1\n(4) \\frac{1}{3}\\left(\\frac{1}{x+1}-\\frac{1}{x+3}\\right)=\\frac{1}{(x+1)(x+3)}'

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Q.48

''

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Q.49

'展开左侧的复杂表达式,以示变为简单的右侧表达式。\n(2),(3)由于左侧和右侧同样复杂,因此对左侧和右侧进行变形,以示它们成为相同的表达式。'

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Q.50

'将2x²-8分解为(x²+4)(x²-2)'

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Q.51

'演习20 III \ \\Rightarrow \ 本册 \ p. 471 \\n(1) 假设1或2是大骰子的结果为 \ X \\n\n\\[ x_{n}=1 \\cdot X+(-1) \\cdot(n-X)=2 X-n \\]\n\n由于 \ X \ 符合二项分布 \\( B\\left(n, \\frac{1}{3}\\right) \\), 所以, \ X \ 的均值 \\( E(X) \\) 和方差 \\( V(X) \\) 是 \\( E(X)=\\frac{n}{3} \\), \\( V(X)=n \\cdot \\frac{1}{3} \\cdot \\frac{2}{3}=\\frac{2}{9} n \\)。\n因此, \ x_{n} \ 的均值 \\( E\\left(x_{n}\\right) \\) 和方差 \\( V\\left(x_{n}\\right) \\) 为\n\\[\egin{aligned}\nE\\left(x_{n}\\right) & =E(2 X-n)=2 E(X)-n \\\\ & =2 \\cdot \\frac{n}{3}-n=-\\frac{n}{3} \\\\nV\\left(x_{n}\\right) & =V(2 X-n)=2^{2} V(X)=\\frac{8}{9} n\n\\end{aligned}\n\\]\n(2) 由于 \\( V\\left(x_{n}\\right)=E\\left(x_{n}^{2}\\right)-\\left\\{E\\left(x_{n}\\right)\\right\\}^{2} \\) 所以\n\\[E\\left(x_{n}^{2}\\right)=V\\left(x_{n}\\right)+\\left\\{E\\left(x_{n}\\right)\\right\\}^{2}=\\frac{8}{9} n+\\left(-\\frac{n}{3}\\right)^{2}=\\frac{1}{9} n(n+8)\\]\n\n(3) 由于 \\( S=\\pi\\left(x_{n}{ }^{2}+y_{n}{ }^{2}\\right) \\), 所以, \ S \ 的均值 \\( E(S) \\) 为\n\n\\[E(S)=\\pi\\left\\{E\\left(x_{n}{ }^{2}\\right)+E\\left(y_{n}{ }^{2}\\right)\\right\\}\\]\n\n现在, 让我们计算 \ y_{n} \ 的均值 \\( E\\left(y_{n}\\right) \\) 和方差 \\( V\\left(y_{n}\\right) \\)。假设1是小骰子的结果为 \ Y \, 那么\n\ y_{n}=2 Y-n \\n\ Y \ 也符合二项分布 \\( B\\left(n, \\frac{1}{6}\\right) \\), 类似于第(1)部分\n\\[ \egin{array}{l}\nE\\left(y_{n}\\right)=2 \\cdot \\frac{n}{6}-n=-\\frac{2}{3} n \\\\\nV\\left(y_{n}\\right)=2^{2} \\cdot n \\cdot \\frac{1}{6} \\cdot \\frac{5}{6}=\\frac{5}{9} n\n\\end{array} \\]\n类似地, 根据第(2)部分\n\\[\egin{aligned}\nE\\left(y_{n}^{2}\\right) & =\\frac{5}{9} n+\\left(-\\frac{2}{3} n\\right)^{2}=\\frac{1}{9} n(4 n+5) \\\\\n\\text { 因此 } \\quad E(S) & =\\pi\\left\\{\\frac{1}{9} n(n+8)+\\frac{1}{9} n(4 n+5)\\right\\} \\\\\n& =\\frac{1}{9} n(5 n+13) \\pi\n\\end{aligned}\\]'

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Q.52

'数学I即(α-1)(β-1)(γ-1)=0,所以α,β,γ至少有一个是1。'

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Q.53

'求多项式 x^2020+x^2021 除以多项式 x^2+x+1 的余数。'

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Q.54

'(2) 令t=x+1/x,则证明利用数学归纳法得到x^n+1/x^n将成为t的n次方程。'

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Q.55

'计算给定的指数'

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Q.56

'设k为实数。 对于三次方程f(x)=x^{3}-kx^{2}-1,设方程f(x)=0的三个解为α,β,γ。 g(x)是一个三次方程,其x^{3}的系数为1,并且方程g(x)=0的三个解为αβ,βγ,γα。\n(1) 请用α,β,γ表达g(x)。\n(2) 求解具有共同解的两个方程f(x)=0和g(x)=0的k值。'

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Q.57

'在练习本册中(第35页), 如果将P的三次项的系数记为a, b, c为常数, 则P = (x+1)^2(ax+b), P-4 = (x-1)^2(ax+c)。'

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Q.58

'将给定的文本翻译成多种语言。'

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Q.59

'300'

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Q.60

'练习 56 (1) (上半部分) P_1=α+β=(1+√2)+(1-√2)=2 又αβ=(1+√2)(1-√2)=-1 因此 P_2=α^2+β^2=(α+β)^2-2αβ=2^2-2(-1)=6 (下半部分) [1] 当n=1时,P_1=2,当n=2时,P_2=6 因此,当n=1,2时,P_n 是非4倍数的偶数。 [2] 假设n=k, k+1时,P_n 是非4倍数的偶数。'

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Q.61

'首项为 a,公差为 d,将首项到第 n 项求和为 S_{n},则 S_{5}=125,S_{10}=500,因此1/2・5{2a+(5-1)d}=125,1/2・10{2a+(10-1)d}=500,得出 a+2d=25 ... (1),2a+9d=100 ... (2)。解方程组 (1),(2) 可得 a=5,d=10'

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Q.62

'关于整式f(x)=x^{4}-x^{2}+1,回答以下问题。'

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Q.63

'(1 + xi)(3 - i)这个表达式是实数还是纯虚数取决于 x 的值。'

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Q.64

'(3u-v)(-u³+3u-v) < 0'

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Q.65

'(1) left(x2+2yright)5 \\left(x^{2}+2 y\\right)^{5} 的展开式的一般项是5mathrmCrleft(x2right)5r(2y)r=5mathrmCrcdot2rx102ryr _{5} \\mathrm{C}_{r}\\left(x^{2}\\right)^{5-r}(2 y)^{r}={ }_{5} \\mathrm{C}_{r} \\cdot 2^{r} x^{10-2 r} y^{r} x4y3 x^{4} y^{3} 的项是r=3r=3时,其系数是'

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Q.66

'展开以下表达式:(a+b)³和(a-b)³'

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Q.67

''

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Q.68

'确定常数 a、b 和 c 的值,使得该等式对于 x 是恒等式。'

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Q.69

'求解展開式(a+2b+3c)^{6}中a^{3} b^{2} c項的系数,以及a^{4} c^{2}項的系数。'

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Q.70

'数列 {P_{n}} 被定义如下。'

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Q.71

'请列举数字版图表式参考书的三个基本功能。'

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Q.72

'等差数列的证明'

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Q.73

'练习,分解下列方程式。'

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Q.74

'是否能将 P 分解为 x、y 的一次式的乘积取决于 α、β 不是 y 的一次式。'

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Q.75

'展开以下表达式。(1) (a+2 b)^{7} (2) (2 x-y)^{6} (3) (2 m+n/3)^{6}'

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Q.76

'利用二项式定理,证明下面的等式。'

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Q.77

'因为抛物线y=x^2+bx+c的顶点在直线y=x上,所以顶点的坐标可以设为(k, k)。因此,抛物线的方程为y=(x-k)^2+k即y=x^2-2kx+k^2+k。抛物线(1)和抛物线y=-x^2+4的交点的x坐标为x^2-2kx+k^2+k=-x^2+4即2x^2-2kx+k^2+k-4=0的实数解。(1),(2)有两个不同的交点,所以设(3)的判别式为D,则D>0。计算D/4=(-k)^{2}-2(k^{2}+k-4)=-k^{2}-2k+8,由此-k^{2}-2k+8>0,即k^{2}+2k-8<0解得-4<k<2.在这种情况下,将两个交点的x坐标记为α、β(α<β),α、β是(3)的解,因此有α+β=k,αβ=(k^{2}+k-4)/2。因此,(β-α)^{2}=(α+β)^{2}-4αβ=k^{2}-2(k^{2}+k-4)=-k^{2}-2k+8=-(k+1)^{2}+9。'

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Q.78

'考虑当数学B329 n=k+2时'

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Q.79

'请证明函数的恒等式。'

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Q.80

'转化递推式, 数学归纳法转化递推式\n- 相邻两项 \\( a_{n+1} = p a_{n} + q \\(p \\neq 1) \\) 对于满足 \ \\alpha = p \\alpha + q \ 的 \ \\alpha \\n\\[\na_{n+1} - \\alpha = p\\left(a_{n} - \\alpha\\right) \n\\]\n- 相邻三项 \ p a_{n+2} + q a_{n+1} + r a_{n} = 0 \ \ p x^{2} + q x + r = 0 \ 的解为 \ \\alpha, \eta \ 那么\n\\[\na_{n+2} - \\alpha a_{n+1} = \eta\\left(a_{n+1} - \\alpha a_{n}\\right)\n\\]\n数学归纳法\n要证明命题 \ P \ 关于自然数 \ n \ 对于所有自然数成立的步骤是\n[1] 证明当 \ n=1 \ 时 \ P \ 成立。\n[2] 假设当 \ n=k \ 时 \ P \ 成立, 证明当 \ n=k+1 \ 时 \ P \ 也成立。'

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Q.81

'(3) 认为存在实数p, q, r, s, t, u满足方程x^{2}+y^{2}-5=(p x+q y+r)(s x+t y+u)。展开右边后,x^2的系数为p s,比较两边的x^2系数得到ps=1。因此,必须满足p不等于0,s不等于0。'

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Q.82

'设a为实常数,考虑两个圆C1:x^{2}+y^{2}=4,C2:x^{2}-6x+y^{2}-2ay+4a+4=0'

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Q.83

'请将以下表达式进行因式分解。'

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Q.84

'求多项式P(x)=4x32x25x+3P(x)=4 x^{3}-2 x^{2}-5 x+3被一次式除时的余数。'

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Q.85

'使用因式定理对以下方程进行因式分解。'

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Q.86

'请计算以下表达式的系数。(6) x^6-12x^5+60x^4-160x^3+240x^2-192x+64'

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Q.87

'拓展 51:因式分解2次2項式(使用解公式)'

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Q.88

'组立除法\n将三次方程式 P(x)=ax3+bx2+cx+d P(x)=a x^{3}+b x^{2}+c x+d 除以一次方程式 xk x-k 得到商式 Q(x)=lx2+mx+n Q(x)=l x^{2}+m x+n 和余数 R R 。\n这个商的系数 l,m,n l, m, n 和余数 R R 可以通过下面的方法求得,这个方法称为组立除法。\n\n正明 根据除法等式 P(x)=(xk)Q(x)+R P(x)=(x-k) Q(x)+R 可得\n\\[\na x^{3}+b x^{2}+c x+d=(x-k)\\left(l x^{2}+m x+n\\right)+R\n\\]\n这个等式是关于 x x 的恒等式。\n将右边展开整理得到\n\\[\na x^{3}+b x^{2}+c x+d=l x^{3}+(m-l k) x^{2}+(n-m k) x+(R-n k)\n\\]\n比较两边系数得到\n\\na=l, \\quad b=m-l k, c=n-m k, d=R-n k\n\\]\n因此\n\\[\nl=a, \\quad m=b+l k, \\quad n=c+m k, \\quad R=d+n k\n\'

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Q.89

'求展开式中带有项的系数'

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Q.90

'请检查以下等式是否恒等式。'

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Q.91

'设k为常数。 当(a+kb+c)^{5}的展开式中 a^{2}bc^{2}的系数为60时,求k的值。另外,求ac^{4}的系数。'

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Q.92

''

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Q.93

'请对给定方程进行因式分解。'

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Q.94

'恒等式的系数确定(1)...系数比较法'

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Q.95

'[7!/(3!2!2!)]'

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Q.96

'使用二项式定理展开(a+b)^{4},并求得各项的系数。'

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Q.97

'数列 {a_{n}}: 1, 3, 8, 19, 42, 89, 的差分序列为 {b_{n}}。若数列 {b_{n}} 的差分序列是等比数列,则\n(1) 求数列 {b_{n}} 的一般项。\n(2) 求数列 {a_{n}} 的一般项。《基本例题 19'

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Q.98

'使用二项式定理,求下列表达式的展开式。'

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Q.99

'请求解以下表达式展开式中括号内项的系数。'

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Q.00

'为了使等式x31=a(x1)(x2)(x3)+b(x1)(x2)+c(x1)x^{3}-1=a(x-1)(x-2)(x-3)+b(x-1)(x-2)+c(x-1)对于所有的xx成立, 确定常数a,b,ca, b, c的值。'

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Q.01

'确定常数a和b的值,使得下列多项式能被给定的表达式整除:'

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Q.02

'\ 30 \\quad \\frac{7}{3} x^{2}-x-\\frac{1}{3} \'

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Q.03

'请因式分解以下表达式。'

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Q.04

'部分分数分解'

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Q.05

'基础 61:高次方程式的解法(1)- 利用因式分解'

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Q.06

'求展开式中 [ ] 内项的系数。'

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Q.07

'在高次多项式的因式分解中,找到使 P(k)=0 成立的 k,然后使用因式定理。 这里我们将讨论如何找到使 P(k)=0 成立的 k。'

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Q.08

'展开式中 (a+b+c)^{n} 的系数是什么?'

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Q.09

'求展開式中的 [ ] 項的係數。'

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Q.10

'找出满足以下条件的多项式 A 和 B。'

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Q.11

'基础 45: 在复数范围内对二次方程进行因式分解'

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Q.12

'(a+b+c)^{5} [a b^{2} c^{2}]的展開式中,[ ]內項的係數是多少?'

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Q.13

'二项式定理'

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Q.14

'请检查以下方程是否恒等式。'

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Q.15

'在数学 I 中,我们学习了因式分解,并学习了如何利用它来解二次方程。在这里,我们将利用因式定理来考虑如何解 n 次以上的方程。'

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Q.16

'设二次方程 (x1)(x2)+(x2)(x3)+(x3)(x1)=0(x-1)(x-2)+(x-2)(x-3)+(x-3)(x-1)=0 的两个解为 alpha,\eta\\alpha, \eta,求下列式子的值。 (1) alpha\eta\\alpha\eta (2) (1alpha)(1\eta)(1-\\alpha)(1-\eta) (3) (alpha2)(\eta2)(\\alpha-2)(\eta-2)'

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Q.17

'将x^2+1/(x^2-1)转换为4(x^2-1)+1/(x^2-1)+4进行思考。'

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Q.18

'请使用二项式定理展开(a+b)^4。'

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Q.19

'请确定常数a、b、c的值,使下面的等式成立,其中x为恒等式(1) \\frac{4 x+5}{(x+2)(x-1)}=\\frac{a}{x+2}+\\frac{b}{x-1}(2) \\frac{3 x+2}{x^{2}(x+1)}=\\frac{a}{x}+\\frac{b}{x^{2}}+\\frac{c}{x+1}'

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Q.20

'已知 B = x^2 + x - 3, Q = 4x - 1, R = 13x - 5,求 A。'

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Q.21

'(2) \\( (x-1)(x+1)(x-2)(x-3) \\)'

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Q.22

'展开以下表达式。'

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Q.23

'曲线 C 和直线 l 的共享点的 x 坐标是,方程 x^{3}+2 x^{2}-4 x-8=0 的实数解。左边有 x+2 作为因数,因此因式分解得到 (x+2)^{2}(x-2)=0,即 x=2,-2,因此,曲线 C 和直线 l 的共享点中,除了接点之外的点的 x 坐标是2。'

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Q.24

'考虑数列{a_n}从第一个数到第五个数,对于n=1,2,3,4,有a_{n+1}=a_{n}+A×10^{n}....对于所有自然数n成立(1),这时,a_{n+2}=a_{n}+B×10^{n}....(2) 成立。a_{1}=11, a_{2}=101, (2)表示,当n为E时,a_{n}是11的倍数,a_{n}是11的倍数时,n是F。'

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Q.25

''

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Q.26

'展开下列表达式。'

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Q.27

'请在复数范围内因式分解以下二次方程:\n(1) \x^{2}-3 x-3 \\n(2) \ 2 x^{2}+4 x-1 \\n(3) \ 2 x^{2}-3 x+2 \'

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Q.28

'设数列{a_{n}},定义b_{n}=\\frac{a_{1}+a_{2}+\\cdots \\cdots+a_{n}}{n}'

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Q.29

'(3) \\( (2 x+1)\\left(3 x^{2}-x+2\\right) \\)'

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Q.30

'求展开式中的 [ ] 中项的系数。6 (1) (x+y+z)^{8}[x^{2} y^{3} z^{3}] (2) (x-y-2 z)^{7} [x^{3} y^{2} z^{2}]'

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Q.31

'证明当a+b+c=0时,a^{2}-b c=b^{2}-c a成立。'

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Q.32

'(1) (x-1)(x+1)(x+3)'

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Q.33

'使用积和公式'

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Q.34

'在数学I中,我们学习了二次式。在数学II中,我们将学习处理三次式等高次数的表达式。因此,让我们首先学习三次式的展开和因式分解。'

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Q.35

'求展开式中的 x^4 项的系数。'

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Q.36

''

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Q.37

'将三次多项式展开并因式分解'

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Q.38

'设2次方程2x²-3x+5=0的两个解为α、β,则以α²、β²为解的二次方程是?'

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Q.39

'使用解的公式进行512元的二次方程的因式分解。'

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Q.40

'确定常数a,b的值,使得下面的等式对于x成立:'

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Q.41

'使用二项式定理,找出以下表达式的展开式。'

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Q.42

'请因式分解以下方程:\\(x^{3}+y^{3}=(x+y)^{3}-3xy(x+y)\\)。'

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Q.43

'[x^3]的系数是多少?'

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Q.44

'如何从递推式中求得通项公式。\\n解下列递推式,求得数列通项公式:\\n\\n1. 等差数列类型\\n\ a_{n+1}=a_{n}+d \\\n\ [d \ 为常数 \\])\\n\\n2. 等比数列类型\\n\ a_{n+1}=r a_{n} \\\n\ [r \ 为常数 \\])\\n\\n3. 差分数列类型\\n\\( a_{n+1}=a_{n}+f(n) \\)\\n\\( [ f(n) 为差分数列通项公式 \\])\\n\\n此外,\\n\ a_{n+1}=p a_{n}+q\\\n\ p \ 和 \ q \ 为常数, \\( p \\neq 1, q \\neq 0 \\)\\n的递推式形式,并解出数列的通项公式。'

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Q.45

'基础 59:高次多项式的因式分解'

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Q.46

''

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Q.47

'求15^4(1+x+x^2)^{8}展开式中x^{11}的系数。'

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Q.48

'请因式分解以下方程式。'

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Q.49

'请计算在以下情况下,A除以B的商和余数。'

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Q.50

'分解下列方程式。'

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Q.51

'数列 {a_{n}}: 1,3,8,19,42,89, \\cdots \\cdots 的差分序列为 {b_{n}}。 当数列 {b_{n}} 的差分序列为等比数列时:(1)求数列 {b_{n}} 的一般项。(2)求数列 {a_{n}} 的一般项。'

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Q.52

'求解展開式'

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Q.53

'展开和因式分解的表达式'

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Q.54

'当 a=2 时,(x-2y+1)(x+y+1),当 a=-5/2 时,(x-2y-2)(x+y-1/2)'

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Q.55

'训练13 求下列等比数列的和。 (1) 第一项为4,公比为1/2,项数为7 (2) 数列3,-3,3,-3,...,项数为n (3) 数列18,-6,2,...,项数为n'

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Q.56

'求调和数列{an}的通项,其中第2项为1,第5项为1/13。'

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Q.57

'解4次方程式x^4+8x^3+20x^2+16x-12=0。'

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Q.58

'除了搅拌之外,给出溶解固体以增快溶解速度的两种方法。假设水和固体的量保持不变。'

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Q.59

'图1显示了一个教室的座位表。共有9个座位,学生全都面向黑板坐着。为了避免前后左右的座位连在一起,座位是确定的。例如,当为座位编号,如果有学生坐在①号座位,其他学生就不能坐在2号和4号座位。请回答以下问题。(1) A、B、C、D、E五位学生坐下时,有多少种确定座位的方式?(2)A、B、C、D四位学生坐下时,有多少种确定座位的方式?(3)A、B、C三位学生坐下时,有多少种确定座位的方式?'

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Q.60

'求1+x+x^2+⋯+x^n的和。'

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Q.61

'將給定的文本翻譯成多種語言。'

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Q.62

'从想成为的自己开始逆向思维。'

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Q.63

'针对数列{an},请回答以下问题:(1)求数列{an^2 + bn^2}的通项公式。并求lim_{n->∞} (an^2 + bn^2)。 (2)证明lim_{n->∞} an = lim_{n->∞} bn = 0。并求∑_{n=1}^{∞} an,∑_{n=1}^{∞} bn。'

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Q.64

'近似值与近似表达式'

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Q.65

''

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Q.66

'从单词mathematics中随机选取4个字母,形成排列的数量。'

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Q.67

'请因式分解以下表达式。'

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Q.68

'在列出PR NAGOYAJO的8个字符的所有排列中,同时包含AA和OO的排列有多少个,不相邻字符的排列有多少个。'

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Q.69

'请因式分解以下方程:'

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Q.70

'请计算以下表达式。'

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Q.71

'将4个A,5个B和2个C分成组合的方法是C_9^5×C_4^2。'

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Q.72

'2 x^{2}-6 x+4'

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Q.73

'将3名学生放入A的方法有 C_9^3 种'

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Q.74

'请将3x ^ {2} -5x +1补全为完全平方。'

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Q.75

'19(1)\\((x+y-1)\\left(x^{2}-x y+y^{2}+x+y+1\\right)\\ (2)\\((x-2 y-z)\\left(x^{2}+4 y^{2}+z^{2}+2 x y-2 y z+z x\\right)'

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Q.76

'整理给定多项式的同类项。'

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Q.77

'展开下列表达式。'

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Q.78

'展开以下表达式。'

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Q.79

'(1) \\( 3(a+b)(b+c)(c+a) \\)\\n(2) \\( (a b+a+b-1)(a b-a-b-1) \\)'

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Q.80

'将以下表达式进行因式分解:2x2+5xy+2y23y22x^{2}+5xy+2y^{2}-3y-2'

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Q.81

'展开以下表达式。'

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Q.82

'请因式分解以下表达式。'

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Q.83

'(x-1)(x+2)(x-3)(x+4)+24的因式分解是什么?'

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Q.84

'因式分解以下表达式。'

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Q.85

'因此,所需排列的数量为\n\\[\n\egin{aligned}\n10080- & 24 \\times(30+30+30+20) \\\\\n& =10080-24 \\times 110=10080-2640 \\\\\n& =7440 \\text { (种) }\n\\end{aligned}\n\\]'

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Q.86

'10\n(1)\\((x-3)(3 x-1)\\)\n(2)\\((x+1)(3 x+2)\\)\n(3)\\((a+2)(3 a-1)\\)\n(4)\\((a-3)(4 a+5)\\)\n(5)\\((2 p+3 q)(3 p-q)\\)\n(6)\\((a x-b)(b x+a)\\)'

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Q.87

'请因式分解以下表达式。\n(1) x^{3}+3xy+y^{3}-1'

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Q.88

'整理多项式'

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Q.89

'计算以下表达式。'

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Q.90

'回答以下实数的子集问题。'

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Q.91

'请因式分解以下表达式:2x23xy+y2+7x5y+62x^{2}-3xy+y^{2}+7x-5y+6'

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Q.92

'将以下表达式进行因式分解。(1) (x+y)^{2}-4(x+y)+3 (2) 9 a^{2}-b^{2}-4 b c-4 c^{2} (3) (x+y+z)(x+3 y+z)-8 y^{2} (4) (x-y)^{3}+(y-z)^{3}'

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Q.93

'请根据 x 进行降幂排序。'

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Q.94

'展开以下表达式。'

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Q.95

'请因式分解以下方程:\n(1) 2 x^{3}+16 y^{3}\n(2) (x+1)^{3}-27'

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Q.96

'(4)\\((3 a-b)(9 a^{2}+3 a b+b^{2})\\)的展开是:'

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Q.97

'将给定的表达式进行因式分解。'

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Q.98

'展开表达式(2x + 3y + z)(x + 2y + 3z)(3x + y + 2z)后,求解xyz的系数。'

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Q.99

'给定字符串的排列总数是多少?'

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Q.00

'76 \\quad y=\\frac{1}{3}(x+1)(x-5)\n\\( \\left(y=\\frac{1}{3} x^{2}-\\frac{4}{3} x-\\frac{5}{3}\\right) \\)'

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Q.01

'10 \u3000 809 11 (1) \\\\ ( 2(x+2 y)(x^{2}-2 x y+4 y^{2}) \\) (2) \\\\ (x-2)(x^{2}+5 x+13) \\)'

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Q.02

'请将{1}/{3}x^{2}+2x+1完成平方。'

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Q.03

'展开公式'

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Q.04

'展开表达式(a+b+c+d)(p+q+r)(x+y),会得到多少项?'

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Q.05

'请计算以下表达式。'

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Q.06

'多项式的乘积展开,可以通过反复利用分配律来展开复杂的表达式。但是,如果继续进行计算而没有考虑因式分解的步骤,很容易陷入困境。在这里,我们按照优先级高低的顺序总结了找到因式分解步骤的方法。在考虑因式分解时,请注意这些要点。'

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Q.07

'设A=5x³ -2x² +3x +4,B=3x³ -5x² +3,计算以下结果:(1) A+B (2) A-B'

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Q.08

'请将-2 x^{2}+10 x-7完成平方。'

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Q.09

'请分解以下表达式。'

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Q.10

'请分解以下方程:x2+3xy+2y2+2x+3y+1x^{2}+3xy+2y^{2}+2x+3y+1'

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Q.11

'(3) \\((3 x+x^{3}-1)\\left(2 x^{2}-x-6\\right)\\)'

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Q.12

'请简化以下数学表达式。'

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Q.13

'3个集合的交集,并集\n交集A∩B∩C是属于A、B、C的元素集合的所有元素。\n并集A∪B∪C是属于至少一个A、B、C的元素集合的所有元素。\n关于3个集合的性质\n(1)\n\\[\n\egin{aligned}\nn(A∪B∪C)= & n(A)+n(B)+n(C) \\\\\n& -n(A∩B)-n(B∩C)-n(C∩A)+n(A∩B∩C)\n\\end{aligned}\n\\]\n(数量定理的扩展)\n(2) \\\overline{A∪B∪C}=\\overline{A} \\cap \\overline{B} \\cap \\overline{C}, \\overline{A∩B∩C}=\\overline{A} \\cup \\overline{B} \\cup \\overline{C} \\n(德摩根律的扩展)'

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Q.14

''

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Q.15

'展开表达式(2x+3y+z)(x+2y+3z)(3x+y+2z)并求出xyz的系数。'

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Q.16

'(例) 对于方程 x^2 - 2 xy + 2 y^2 = 13(x > 0,y > 0)'

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Q.17

'请分解以下表达式:\n\nx^3 - 8y^3 - z^3 - 6xyz'

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Q.18

''

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Q.19

'展开以下表达式。'

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Q.20

'请简化这个表达式。'

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Q.21

'(5) 展开以下表达式。(x+y+z)(x-y-z)'

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Q.22

'展开以下表达式。'

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Q.23

'方幂定理'

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Q.24

'对称表达式'

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Q.25

'展开以下表达式。'

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Q.26

'6(1)\\n\\[\\n\\\egin{aligned}\\n x^{2}-14 x+49 & =x^{2}-2 \\\\cdot x \\\\cdot 7+7^{2} \\\\\n & =(x-7)^{2} \\end{aligned} \\n\\]\\n(2)\\(a^{2}+12 a b+36 b^{2}=a^{2}+2 \\\\\\\\cdot a \\\\\\\\cdot 6 b+(6 b)^{2}\\)\\n\\[\\n=(a+6 b)^{2}\\n\\]\\n(3)\\(25 a^{2}-81=(5 a)^{2}-9^{2}\\)\\n\\[\\n=(5 a+9)(5 a-9)\\n\\]\\n(4)\\n\\[\\n\\\egin{aligned}\\n9 x^{2}-64 y^{2} & =(3 x)^{2}-(8 y)^{2} \\\\\\\\n & =(3 \oldsymbol{x}+8 \oldsymbol{y})(3 \oldsymbol{x}-8 \oldsymbol{y})\\n\\end{aligned}\\n\\]\\n(5)\\n\\[\\n\\text{5) } \egin{aligned}\\n& 25 x^{2}+40 x y+16 y^{2} \\\\\\\\n= & (5 x)^{2}+2 \\\\\\\\cdot 5 x \\\\\\\\cdot 4 y+(4 y)^{2} \\\\\\\\n= & (5 x+4 y)^{2}\\n\\end{aligned}\\n\\]\\n(6)\\n\\[\\n\\text{(6) } \egin{aligned}\\n& 9 a^{2}-42 a b+49 b^{2} \\\\\\\\n= & (3 a)^{2}-2 \\\\\\\\cdot 3 a \\\\\\\\cdot 7 b+(7 b)^{2} \\\\\\\\n= & (3 a-7 b)^{2}\\n\\end{aligned}\\n\\]\\n(7)\\n\\[\\n\\\egin{aligned}\\n x^{2}+5 x+6 & =x^{2}+(2+3) x+2 \\\\\\\\n x^{2}-7 x+12 & =x^{2}+(-3-4) x+(-3) \\\\\\\\n & =(x-3)(x-4)\\n\\end{aligned}\\n\\]\\n(8)\\n\\[\\n\\\egin{aligned}\\n x^{2}-7 x+12 & =x^{2}+(-3-4) x+(-3) \\\\\\\\n & =(x-3)(x-4)\\n\\end{aligned}\\n\\]'

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Q.27

'将给定方程转化为形式 y=a(x-p)^{2}+q(完成平方)。'

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Q.28

'请因式分解以下表达式。'

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Q.29

'请将以下方程分解因式。'

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Q.30

'12(1) \\((x-y)(2x+y-1)\\) (2) \\((x+y-3)(3x+y+2)\\) (3) \\((x+2y-1)(3x-y+2)\\) (4) \\((x+y-z)(x-2y+z)\\)'

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Q.31

'一个被4条直线围成的长方形,是由2条垂直线和2条水平线组合而成的,所以所求个数为${}_5 C_2 \\times {}_5 C_2={\\left(\\frac{5 \\cdot 4}{2 \\cdot 1}\\right)}^2=10^2=100 \\text{(个)}'

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Q.32

'使用0、1、2、3、4、5这6种数字,能够组成多少个不超过4位的正整数?允许重复使用同一个数字。'

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Q.33

'A市和B市之间有5条独立的公交线路。在以下情况下,有多少种方法可以往返A市和B市。'

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Q.34

'假设有4颗白色珠子,3颗黑色珠子,1颗红色珠子。将它们排成一行有\ \\square \种方法,排成一个圆有\ \\square \种方法。此外,通过这些珠子穿线,制作成环的方法有\ \\square \种。'

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Q.35

'请分解以下方程。'

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Q.36

'请因式分解以下表达式。'

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Q.37

'练习答案 1 (1) \ -x^{2}+5 x-1 \ (2) \ -3 x^{2}+3 x y-4 y^{2} \'

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Q.38

'(4)尽量因式分解3x3+(9y+z)x23y(z+2y)x+2y2z -3x^{3} + (9y + z)x^{2} - 3y(z + 2y)x + 2y^{2}z 。'

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Q.39

'请计算以下表达式。'

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Q.40

'(2) 2 x^{2}-4 x+2=2(x^{2}-2 x+1)'

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Q.41

'請因數分解以下方程式。'

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Q.42

'请因式分解以下表达式。'

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Q.43

'数,字母和它们的乘积表达式称为什么?'

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Q.44

'二次展开公式'

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Q.45

''

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Q.46

'展开下列表达式。'

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Q.47

'展开以下表达式。'

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Q.48

''

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Q.49

'整理以下方程式,按照x(1),x(2),a(3)的次幂顺序。'

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Q.50

'整理以下表达式,按照x的降幂顺序。'

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Q.51

'请将以下二次方程完成平方。'

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Q.52

'请因式分解以下表达式。'

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Q.53

'给定多项式P=3x^{3}-3xy^{2}+x^{2}-y^{2}+ax+by。'

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Q.54

'展开公式是 (a^2) - (b^2)'

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Q.55

'请计算以下表达式。'

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Q.56

'使用因式分解公式展开以下表达式。'

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Q.57

'(a-b)^{2}的展开公式是a^{2}-2ab+b^{2}'

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Q.58

''

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Q.59

'请分解以下表达式。'

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Q.60

'在第2节“多项式的乘法”中,我们学习了如何展开多项式的乘积形式,并将其表示为一个多项式的方法。现在,我们将学习相反的过程,即将一个多项式表示为单项式或多项式的乘积形式。'

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Q.61

'展开以下表达式。'

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Q.62

'(1) \7 x^{2} + 4 x - 17\ (2) \\(x^{2}-(2 a-b) x-a\\) (3) \\(-a^{2}-2(7 b-2) a+2 b^{2}+2 b-5\\)'

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Q.63

'展开以下表达式:x(x-1)(x+1)(x^2+1)(x^4+1)'

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Q.64

'将函数y=f(x)的图像相对于原点对称移动时所代表的函数是y=-f(-x)。如果a和b是实数,并且函数f(x)=x^{2}+ax+b在0 <= x <= 1处的最小值为m,则用a和b来表示m。'

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Q.65

'(7) \ 4 x^{4}-13 x^{2} y^{2}+9 y^{4} \'

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Q.66

'将给定方程y=-x^{2}+2 x进行转换'

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Q.67

'请分解以下表达式。'

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Q.68

'展开以下表达式:\n(x+2y)^2(x^2+4y^2)^2(x-2y)^2'

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Q.69

'请使用乘法计算以下多项式:(x + 2)(x - 3)'

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Q.70

'请因式分解以下多项式。'

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Q.71

'请因式分解以下表达式。'

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Q.72

'确定单项式的次数和系数。还可以确定方括号内的字母对应的次数和系数。'

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Q.73

'请完成以下二次方程的平方'

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Q.74

'请因式分解以下表达式。'

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Q.75

'计算以下表达式:(4) (√3 + √5)²'

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Q.76

'从7名成员中选择部长、副部长和财务的方法有多少种?请注意,不允许兼任。'

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Q.77

'请因数分解以下表达式。'

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Q.78

'展开以下表达式。'

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Q.79

'与以往不同,考虑允许重复使用相同物品的排列。例如,如果从两种字符A和B中允许重复地取3个字符排成一行,则树状图如右所示,总共有2^{3} (种方式)。'

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Q.80

'求下列方程的值。'

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Q.81

''

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Q.82

'请因式分解以下表达式。'

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Q.83

''

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Q.84

'(1) 展开以下表达式。(2) (3 x-1)^{3}(3) (3 x^{2}-a)(9 x^{4}+3 a x^{2}+a^{2})(4) (x-1)(x+1)(x^{2}+x+1)(x^{2}-x+1)(5) (x+2)(x+4)(x-3)(x-5)(6) (x+1)^{3}(x-1)^{3}'

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Q.85

'请因式分解以下表达式。'

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Q.86

''

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Q.87

'分解下列方程式。(1) 8x³+1 (2) 64a³-125b³'

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Q.88

''

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Q.89

'(ア) -x^{2}+8 x\n(1) -x^{2}+16\n(ウ) 2\n(I) 24'

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Q.90

'请因式分解以下表达式。(1) x^3 + 2x^2y - x^2z + xy^2 - 2xyz - y^2z (2) x^3 + 3x^2y + zx^2 + 2xy^2 + 3xyz + 2zy^2'

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Q.91

'将给定表达式进行转换,并求出最大值和最小值: (1) 3x^2 + 4y^2 进行转换并代入。 (2) 根据x和y的范围求最大值和最小值。 (3) 当x为实数时,y = (x^2 + 2x)^2 + 8(x^2 + 2x) + 10 进行转换,并令t = x^2 + 2x。求最大值和最小值。'

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Q.92

'在展开的表达式中,x^5的系数为甲,x^3的系数为乙。'

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Q.93

'将 10 名学生分成一些小组。这时有多少种将其分为(1) 2 人,3 人,5 人的 3 个小组的方法。(2) 3 人,3 人,4 人的 3 个小组的方法。(3) 2 人,2 人,3 人,3 人的 4 个小组的方法。'

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Q.94

''

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Q.95

'将抛物线y=x^{2}+a x+b关于原点对称移动后的抛物线方程是,将x,y分别替换为-x,-y得到-y=(- x)^{2}+a(-x)+b即y=-x^{2}+a x-b。将抛物线y=-x^{2}+a x-b沿x轴方向移动3个单位,y轴方向移动6个单位,新抛物线方程是y-6=-(x-3)^{2}+a(x-3)-b即y=-x^{2}+(a+6) x-3a-b-3,这等于y=-x^{2}+4 x-7,因此a+6=4,-3a-b-3=-7,解得a=-2,b=10。'

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Q.96

'展开以下表达式。'

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Q.97

'包含相同物品的排列'

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Q.98

'请因式分解表达式(3)(x + 1)(x + 2)(x + 3)(x + 4) - 3。'

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Q.99

'请分解以下表达式。'

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Q.00

'(9) 将下列表达式因式分解:(ab)x2+(ba)xy (a-b) x^{2}+(b-a) x y '

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Q.01

'请将以下表达式进行因式分解。'

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Q.02

'展开(a+b+c)(x+y)(p+q)后,会得到多少项?'

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Q.03

'将抛物线y=ax^{2}+bx+c沿x轴方向平行移动2个单位,y轴方向平行移动-1个单位,得到抛物线33y=-2x^{2}+3。求解系数a、b、c的值。'

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Q.04

'(a+b)^{2}的展开公式是:a^{2} + 2ab + b^{2}'

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Q.05

'展开以下表达式。'

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Q.06

'请因式分解以下表达式:(1) 6x^{2}+13x+6 (2) 3a^{2}-11a+6 (3) 12x^{2}+5x-2 (4) 6x^{2}-5x-4 (5) 4x^{2}-4x-15 (6) 6a^{2}+17ab+12b^{2} (7) 6x^{2}+5xy-21y^{2} (8) 12x^{2}-8xy-15y^{2} (9) 4x^{2}-3xy-27y^{2}'

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Q.07

'从4名学生中选出1名主席和1名副主席时,有多少种选择方式?要求主席和副主席不能兼任。'

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Q.08

'展开以下表达式:(x+1)(x+2)(x-1)(x-2)'

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Q.09

'(1) 展开表达式 (x-2 y+1)(x-2 y-2)'

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Q.10

'如果有3名候选人,并且有10人进行匿名投票,那么有多少种投票方式?'

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Q.11

''

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Q.12

'1. (1)次数3,系数为2;aa:次数1,系数为2x22x^{2}\n2. 次数17,系数为\x0crac13-\x0crac{1}{3}yy:次数7,系数为\x0crac13ab7x2-\x0crac{1}{3}ab^{7}x^{2}aabb:次数8,系数为\x0crac13x2y7-\x0crac{1}{3}x^{2}y^{7}'

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Q.13

'(3) x^{3}+2 x^{2}-9 x-18\nx^{3}+2 x^{2}-9 x-18=(x^{3}+2 x^{2})-(9 x+18)=x^{2}(x+2)-9(x+2)=(x+2)…'

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Q.14

'展开以下表达式。'

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Q.15

'请计算一种,三种和四种香料的图案数量,并找出每种情况的可能性。'

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Q.16

'将 12 个人分成几种方式?'

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Q.17

'计算以下方程:(6)(4 + 2√3)(4 - 2√3)'

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Q.18

'请展开以下表达式。'

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Q.19

'(9) \\ ((x+y)^{4}+(x+y)^{2}-2)'

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Q.20

'请因式分解以下表达式。'

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Q.21

'请因式分解以下方程:'

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Q.22

'请因式分解以下表达式。'

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Q.23

'解释以下表达式的计算:(a+b)^2 + (a-b)^2'

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Q.24

'计算以下表达式:(5) (3√2 - √3)²'

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Q.25

'(4)(a-b)^{2}+c(b-a) 的因式分解是什么?'

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Q.26

'把抛物线 y=x^{2}+a x+b 关于原点对称移动,再沿 x 轴方向移动 3,y 轴方向移动 6,得到抛物线 y=-x^{2}+4 x-7。求解 a 和 b 的值。'

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Q.27

'请将以下二次方程式配方完毕。'

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Q.28

'将 12 人分成以下几种方式, 有多少种分法?'

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Q.29

'数学 I'

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Q.30

'请因数分解以下表达式。'

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Q.31

'请因式分解以下表达式。'

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Q.32

'请完成以下二次方程的平方'

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Q.33

'请将以下表达式因式分解。'

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Q.34

'展开(a+b+c)(x+y)(p+q)后,会得到多少项?'

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Q.35

'展开下列表达式。'

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Q.36

'展开以下表达式。'

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Q.37

'整理多項式並進行加法和減法。'

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Q.38

'请分解以下方程式。'

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Q.39

'展开(ax+b)(cx+d)的公式。'

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Q.40

'求抛物线 y=x^{2}-4 a x+4 a^{2}-4 a-3 b+9 的顶点坐标。另外,请找到使得该抛物线与 x 轴没有共享点的自然数 a, b。'

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Q.41

'基本示例 9, 10\n展开以下表达式:\n(x+1)(x-2)(x+3)(x-4)'

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Q.42

'展开以下表达式。'

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Q.43

'单项式的乘积是使用指数法则计算的。例如 2 a b \\times 3 a^{2} b'

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Q.44

'组队问题有区别和无区别'

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Q.45

'(1) y=(x1)22[y=x22x1]y=(x-1)^{2}-2[y=x^{2}-2 x-1]\\n(2) y=(x1)2+2[y=x2+2x+1]y=-(x-1)^{2}+2[y=-x^{2}+2 x+1]'

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Q.46

'展开下列表达式:(a+b+c)^2(a+b-c)^2'

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Q.47

'展开以下表达式。'

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Q.48

'请因式分解以下表达式。'

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Q.49

''

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Q.50

'(5) x^{3}+x^{2}+3 x y-27 y^{3}+9 y^{2}\nx^{3}-27 y^{3}+{x²+3 x y+9 y²}=(x-3 y)[x²+x⋅3 y+(3 y)²]+x²+…'

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Q.51

'(1) \ x^{2}+x+\\frac{1}{4} \'

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Q.52

'请将以下表达式进行因式分解。'

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Q.53

'已知 3^{3} x^{2} 的系数为 -1,图形经过点 (1,1),顶点位于直线 y=x 上的二次函数是什么?'

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Q.54

'展开以下表达式。'

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Q.55

'[2*(x)^6]'

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Q.56

'(2) \\( x^{3}-3 x^{2}+7=a(x-2)^{3}+b(x-2)^{2}+c(x-2)+d \\)'

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Q.57

''

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Q.58

'将给定的表达式A除以x+2,商为B,余数为-5。再将商B除以x+2,商为38x^2-4,余数为2。求当整式A除以(x+2)^2时的余数。根据神奈川大学的条件:A=(x+2)B-5,B=(x+2)(x^2-4)+2。将(2)代入(1)得:A=(x+2){(x+2)(x^2-4)+2}-5=(x+2)^2(x^2-4)+2(x+2)-5=(x+2)^2(x^2-4)+2x-1。因此,将A除以二次式(x+2)^2得到的余数为一次式或常数,所以求得余数为2x-1。'

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Q.59

'求数列 {a_n} 的通项公式,使得从第一个到第 n 个数的和 S_n 满足以下关系:'

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Q.60

''

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Q.61

'这个等差数列{an}的第一个到第n个和为Sn。(1)的结果,对于a1到a16是正数,a17之后是负数,所以Sn在n=16时达到最大值。'

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Q.62

'展开下列表达式。'

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Q.63

'求和:\\(\\sum_{l=5}^{9}(2+l^{2})\\)'

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Q.64

'请分解以下方程:(1) a3b3b3c3a^{3} b^{3}-b^{3} c^{3};(2) (x+y)3(y+z)3(x+y)^{3}-(y+z)^{3};(3) 8a336a2+54a278 a^{3}-36 a^{2}+54 a-27'

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Q.65

'证明下列等式。'

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Q.66

'请在复数范围内对以下二次方程进行因式分解。(1) x^2 - 20x + 91 (2) x^2 - 4x - 3 (3) 3x^2 - 2x + 3'

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Q.67

'(2) \ x^{4}-16 x^{2}+16 \'

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Q.68

'\\(\\left(a^{2}+b^{2}+c^{2}\\right)\\left(x^{2}+y^{2}+z^{2}\\right)=(a x+b y+c z)^{2} \\)+(a y-b x)^{2}+(b z-c y)^{2}+(c x-a z)^{2} \\)'

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Q.69

'已知多项式f(x)除以(x-1)^2的商和余数分别为g(x)和3x-1,并且当f(x)除以352(x-2)时余数为6。求g(x)除以x-2的余数是多少,以及f(x)除以(x-1)(x-2)的商为多少x-ウ几?'

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Q.70

'将整式A除以x+2,商为B,余数为-5。再将商B除以x+2,商为x^2-4,余数为2。求将整式A除以(x+2)^2后的余数。'

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Q.71

'使用展开公式(a-b)^{3}=a^{3}-3a^{2}b+3ab^{2}-b^{3},将x^{3}-6x^{2}y+12xy^{2}-8y^{3}进行因式分解。'

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Q.72

'用通項展開( x + 1 )^6,可以得到'

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Q.73

'求下列和。'

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Q.74

'求解数列的通项公式问题(1):\\egin{\overlineray}{l}a_{1}=1 \\\\a_{2}=3 a_{1}-1=3 \\cdot 1-1=2 \\\\a_{3}=3 a_{2}-1=3 \\cdot 2-1=5 \\\\a_{4}=3 a_{3}-1=3 \\cdot 5-1=14 \\\\a_{5}=3 a_{4}-1=3 \\cdot 14-1=41 \\end{\overlineray}\'

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Q.75

'二项式定理是一个关于代数运算的公式,用于展开形如 (a+b)^n 的多项式。展开式是指将多项式乘开并相加以得到结果的方式。'

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Q.76

'求解下列展开式中方括号内的值。'

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Q.77

'请因式分解以下表达式。'

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Q.78

'请分解以下表达式。'

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Q.79

'一次式 x-k 是多项式 P(x) 的因子的条件是什么?'

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Q.80

'(1)由于P(-2)=-3,所以P(x)=(x-1)(x+2)Q_{3}(x)+a(x+2)-3。(2)由于P(1)=4,所以3a-3=4,因此a=\\frac{7}{3}。因此,要求的余数是\\frac{7}{3}(x+2)-3=\\frac{7}{3}x+\\frac{5}{3}。'

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Q.81

'(a) 在有理数范围内,将以下方程进行因式分解:\n1)x4+2x215 x^{4}+2 x^{2}-15 \n2)8x327 8 x^{3}-27 \n(b) 在实数范围内,将以下方程进行因式分解:\n1)x4+2x215 x^{4}+2 x^{2}-15 \n2)8x327 8 x^{3}-27 \n(c) 在复数范围内,将以下方程进行因式分解:\n1)x4+2x215 x^{4}+2 x^{2}-15 \n2)8x327 8 x^{3}-27 '

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Q.82

'(3) \\( P(x)=\\{x(x+3)\\}\\{(x+1)(x+2)\\}-24 \\)'

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Q.83

'请在(甲)有理数,(乙)实数,(丙)复数范围内因式分解以下表达式:\n(1)x^{4}+2 x^{2}-15\n(2)8 x^{3}-27'

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Q.84

'[计算指定展开表达式中的项的系数]'

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Q.85

'將x^{3}-x^{2}-5x-3代入x=-1得到(-1)^{3}-(-1)^{2}-5\\cdot(-1)-3=0 \\n因此,x^{3}-x^{2}-5x-3有因數x+1或x^{3}-x^{2}-5x-3=(x+1)(x^{2}-2x-3) =(x+1)^{2}(x-3)'

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Q.86

'求解PR\\left(x^{2}-3 x+1\\right)^{10}展开式中的x^{3}的系数。'

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Q.87

'求解以下数列的通项公式。-3, 2, 19, 52, 105, 182, 287, ...'

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Q.88

'请计算展开表达式中的指定项'

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Q.89

'(x+y)^{3}展开为x^3+3x^2y+3xy^2+y^3。'

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Q.90

'假设PR中a为常数。对于抛物线y=x2+ax+3ay=x^{2}+a x+3-a,当a变化为所有实数值时,求顶点的轨迹。抛物线的方程可以变形为y=left(x+fraca2right)2fraca24a+3y=\\left(x+\\frac{a}{2}\\right)^{2}-\\frac{a^{2}}{4}-a+3,设抛物线的顶点为P(x, y),则x=fraca2x=-\\frac{a}{2}(1),y=fraca24a+3y=-\\frac{a^{2}}{4}-a+3(1)由(1)可知a=2xa=-2 x,将此代入(2)得y=frac14(2x)2(2x)+3=x2+2x+3y=-\\frac{1}{4}(-2 x)^{2}-(-2 x)+3=-x^{2}+2 x+3,因此所求轨迹为抛物线y=x2+2x+3y=-x^{2}+2 x+3,对应顶点坐标为left(fraca2,fraca24a+3right)\\left(-\\frac{a}{2},-\\frac{a^{2}}{4}-a+3\\right)。'

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Q.91

'利用共轭复数也是解的性质,解方程 f(x)=0 时,如果有虚数解 p+q i,那么 p-q i 也是解。'

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Q.92

'证明至少有一个为0'

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Q.93

'请在复数范围内因式分解以下二次方程:\n(1) 15x2+14x8 15 x^{2}+14 x-8 \n(2) x22x2 x^{2}-2 x-2 \n(3) x2+2x+3 x^{2}+2 x+3 '

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Q.94

'在展开表达式中求得项的系数'

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Q.95

'\\( x^{4}-16 =\\left(x^{2}-4\\right)\\left(x^{2}+4\\right) =(x+2)(x-2)\\left(x^{2}+4\\right) \\)\\n因此,方程式是\\n\\[(x+2)(x-2)\\left(x^{2}+4\\right)=0\\]\\n因此\ x+2=0 \ 或者 \ x-2=0 \ 或者 \ x^{2}+4=0 \ 所以\ x= \\pm 2, \\pm 2 i \'

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Q.96

'求解以下表达式的展开式中的 [a^2 b^3 c^2 项的系数]'

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Q.97

'将给定文本翻译成多种语言。'

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Q.98

'(1) 求 (2x^3 - 3x)^5 中的 [x^9] 项的系数'

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Q.99

'当常数为k时,二次方程x2+3xy+2y23x5y+kx^{2}+3xy+2y^{2}-3x-5y+k可以被解因数分解为x,yx,y的一次方程的乘积时,求k的值。并求解因数分解的结果。'

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Q.00

'将给定的数列 \ \\left\\{a_{n}\\right\\} \ 定义为首项为1、公差为3的等差数列。将从数列 \ \\left\\{a_{n}\\right\\} \ 的首项到第 \ n \ 项的 n 个项的两两乘积之和记为 \ S_{n} \。例如,\ S_{3}=a_{1} a_{2}+a_{1} a_{3}+a_{2} a_{3} \。求出 \ S_{10} \。'

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Q.01

'求解下列展开式中的指定项系数。'

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Q.02

'(3)求解方程 (x + 1)(x + 3) = x(9 - 2x)。'

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Q.03

'有5张卡片,上面分别写着从1到5的数字。从中同时取出2张卡片时,找出所取卡片上的数字的期望值(E(5 X^{2}+3))和方差(V(3 X + 1))。'

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Q.04

'利用二项定理展开 (a + b)^n。'

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Q.05

'(1) 设a,b为常数,假设关于x的多项式x^{3}+ax+b被(x+1)^{2}整除。求a,b的值。(2) 设n为大于2的自然数。当关于x的多项式x^{n}+ax+b被(x-1)^{2}整除时,求常数a,b的值。'

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Q.06

'请因式分解以下多项式:x^3 - 6x^2 + 11x - 6。'

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Q.07

''

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Q.08

'(1) (Equation) \\( = \\frac{x^{2}-1}{x+1} = \\frac{(x+1)(x-1)}{x+1} \\)\ = x-1 \ (2) And Equation \=\\frac{x^{2}}{x^{2}-1}-\\frac{2 x}{x^{2}-1}+\\frac{1}{x^{2}-1} \\\(=\\frac{x^{2}-2 x+1}{x^{2}-1}=\\frac{(x-1)^{2}}{(x+1)(x-1)}=\\frac{x-1}{x+1} \\)'

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Q.09

'求(1)展开式中的x³的系数[爱知工大]'

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Q.10

'一次式 ax+b 是多项式 P(x) 的因式的条件是什么?'

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Q.11

'为了确保第一表达式能够被第二表达式整除,请确定常数 a, b, c, d, e 的值。'

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Q.12

'在公式 Sn=fracaleft(rn1right)r1 S_n = \\frac{a\\left(r^n-1\\right)}{r-1} 中,取 a=1,r=2,n=10 a=-1, r=2, n=10 ,求得的和为\n\\[ \\frac{-1 \\cdot\\left(2^{10}-1\\right)}{2-1} = -(1024-1) = -1023 \\]\n在公式 Sn=na S_n = na 中,取 n=10,a=3 n=10, a=3 ,求得的和为\n\ 10 \\cdot 3 = 30 \'

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Q.13

'展开以下表达式。'

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Q.14

'给定等式如下:'

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Q.15

'求解函数 f(x)=a x^{3}+b x^{2}+c x+d, 使得 \\[\\int_{-3}^{3} f(x) d x=s \\cdot f(p)+t \\cdot f(q)\\] 成立, 其中 s, t, p, q 的值。且要求 p ≤ q。'

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Q.16

'展开以下三次方程并因式分解:(a+b)^{3},(a-b)^{3},(a+b)(a^{2}-ab+b^{2}),(a-b)(a^{2}+ab+b^{2})'

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Q.17

'请分解以下表达式:\n2. (1) (甲) 乘积:(3 x-y)(9 x^{2}+3 x y+y^{2})\n(乙) 乘积:9(a+2 b)(a^{2}-2 a b+4 b^{2})\n(丙) 乘积:(2 x-y z)(4 x^{2}+2 x y z+y^{2} z^{2})\n(2) (x+4)^{3}'

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Q.18

'证明以下等式成立。'

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Q.19

'(1) \\((x-7)(x-13)\\)\n(2) \\((x-2-\\sqrt{7})(x-2+\\sqrt{7})\\)\n(3) \\(3\\left(x-\\frac{1+2 \\sqrt{2} i}{3}\\right)\\left(x-\\frac{1-2 \\sqrt{2} i}{3}\\right)\\)'

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Q.20

'假设 a 是负常数。求函数 f(x)=2x³-3(a+1)x²+6a x 在区间 -2 ≤ x ≤ 2 的最大值和最小值。'

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Q.21

'填写方框,使方程式成立:(x-1)^{3}-7(x-1)^{2}+17(x-1)-9 = 314'

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Q.22

'使用以下步骤找到a_n:(1) a_{n}=2+\\frac{3}{n+2} (2) a_{n}=\\frac{3 \\cdot 5^{n}+1}{5^{n}-1}'

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Q.23

'计算下列表达式:(1) \\( \\frac{1}{(x-3)(x-1)}+\\frac{1}{(x-1)(x+1)}+\\frac{1}{(x+1)(x+3)} \\) (2) \ \\frac{1}{a^{2}-a}+\\frac{1}{a^{2}+a}+\\frac{1}{a^{2}+3 a+2} \'

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Q.24

'当 k 是常数时,二次方程 x^2+3xy+2y^2-3x-5y+k 能够因式分解为 x, y 的一次方程的乘积。求 k 的值。并且求得因式分解的结果。'

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Q.25

'(1) \ a_{n}=5^{n+1}-20 \\cdot 3^{n-1} \'

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Q.26

'请确定常数 a、b、c 的值,使得下面的等式对于 x 和 y 成立:(1) x^2 + a x y + b y^2 = (c x + y)(x - 4y)'

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Q.27

'(2)(2x-\\frac{1}{2}y+z)^4[x y^2 z]的系数'

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Q.28

''

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Q.29

'(1) \\( (x+y)^{3}=x^{3}+3 \oldsymbol{x}^{2} \oldsymbol{y}+3 \oldsymbol{x} \oldsymbol{y}^{2}+\oldsymbol{y}^{3} \\)(2) \\( (a-1)\\left(a^{2}+a+1\\right)=a^{3}-1^{3}=a^{3}-1 \\)'

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Q.30

'求等差数列的和:\\( \\sum_{k=5}^{14}(2k-9) \\)'

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Q.31

'请因式分解以下表达式。'

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Q.32

''

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Q.33

'对于图形 B_{n+1},请注意最右边的一列。如图1所示,在突出的部分放置瓷砖垂直,剩下的部分将与图形 A_{n+1} 相匹配。这种铺瓷砖的方式有a_{n+1}种。另一方面,如图2所示,在突出的部分放置横向瓷砖会有3种配置方式,并且剩下的部分与图形 B_{n} 相匹配。这种铺瓷砖的方式有b_{n}种。由此可得 b_{n+1} = a_{n+1} + b_{n},其中b_{2} = a_{2} + b_{1} = 11 + 4 = 15'

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Q.34

'求解以下表达式的系数:\n1. (1) x^{3}-x^{2}+\x0crac{1}{3} x-\x0crac{1}{27}\n(2) -8 s^{3}+12 s^{2} t-6 s t^{2}+t^{3}\n(3) 27 x^{3}+8 y^{3}\n(4) -a^{3}+27 b^{3}\n(5) 64 x^{6}-48 x^{4} y^{2}+12 x^{2} y^{4}-y^{6}'

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Q.35

'请因数分解以下表达式。'

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Q.36

'将右边改写为'

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Q.37

'设 g(x) = (x^3 - 2x^2 - 45x - 40) / (x - 8),求 g(2020) 的小数部分。其中,实数 a 的小数部分是指,将 a 取整后得到的最大整数为 n,其差值为 a - n。'

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Q.38

'求下列等差数列的通项公式。\n(a)1,-\\frac{1}{2},-2,-\\frac{7}{2} ,\n(b)p+1,4,-p+7,-2 p+10 ,\n(2)在公差数列中,第9项为26,第18项为53,134是该数列的第几项?另外,第几项首次超过1000。'

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Q.39

'求等差数列的通项公式。设首项为a,公差为d。'

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Q.40

'请因式分解以下表达式。(1) 2(x1)211(x1)+152(x-1)^{2}-11(x-1)+15 (2) x2y2+4y4x^{2}-y^{2}+4y-4 (3) x410x2+9x^{4}-10x^{2}+9 (4) (x2+3x)22(x2+3x)8(x^{2}+3x)^{2}-2(x^{2}+3x)-8'

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Q.41

'展开以下方程式。'

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Q.42

'展开下列表达式。'

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Q.43

'(x+1)(x+2)(x+3)(x+4) - 24的因式分解为 (x^2 + 5x + 4)(x^2 + 5x + 6)'

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Q.44

'展开(x+y+1)(x^{2}-xy+y^{2}-x-y+1)。'

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Q.45

'(2) \\[\egin{aligned}(x-1)(x-2)(x+1)(x+2) & =(x-1)(x+1) \\times(x-2)(x+2) =(x^{2}-1) \\times(x^{2}-4) =(x^{2})^{2}-5 x^{2}+4 =x^{4}-5 x^{2}+4 \\]'

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Q.46

'将给定的文本翻译成多种语言。'

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Q.47

'\\[ (4) \\left(-2 a x^{3} y\\right)^{2}\\left(-3 a b^{2} x y^{3}\\right) =(-2)^{2} a^{2}\\left(x^{3}\\right)^{2} y^{2} \\times(-3) a b^{2} x y^{3} =4 a^{2} x^{6} y^{2} \\times(-3) a b^{2} x y^{3} =4 \\cdot(-3) a^{2+1} b^{2} x^{6+1} y^{2+3} =-12 a^{3} b^{2} x^{7} y^{5} \\]'

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Q.48

'展开以下表达式。'

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Q.49

'综合实数x、y满足|2x+y|+|2x-y|=4时,2x^2+xy-y^2的可取值范围是11≤2x^2+xy-y^2≤9。'

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Q.50

'将给定的问题翻译成多种语言。'

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Q.51

'请因式分解以下表达式。'

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Q.52

'请将以下方程进行因式分解。'

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Q.53

'令 a 为实数,b 为正常数。求函数 f(x)=x^{2}+2(a x+b|x|) 的最小值 m。另外,当 a 变化时,将 a 值作为横轴,m 的值作为纵轴绘制 m 的图形。'

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Q.54

''

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Q.55

'分解下列方程式。'

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Q.56

'(1)对左边进行因数分解得到'

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Q.57

'(1) 利用 a^{3}+b^{3}=(a+b)^{3}-3 a b(a+b),对 a^{3}+b^{3}+c^{3}-3 a b c 进行因式分解。'

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Q.58

'(3a-2b)^{2}'

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Q.59

'请因式分解以下方程:\n(1) 3 x^{2}+10 x+3\n(2) 2 x^{2}-9 x+4\n(3) 6 x^{2}+x-1\n(4) 8 x^{2}-2 x y-3 y^{2}\n(5) 6 a^{2}-a b-12 b^{2}\n(6) 10 p^{2}-19 p q+6 q^{2}'

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Q.60

'(4) (2√6+√3)(√6-4√3)的值是多少?'

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Q.61

'展开以下表达式。'

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Q.62

'请因式分解以下表达式。'

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Q.63

'将给定的方程进行因式分解。(1) x^{2}-2 x y+y^{2}-x+y'

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Q.64

'将给定表达式进行因式分解。'

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Q.65

'利用十字相乘法因式分解公式 acx2+(ad+bc)x+bd=(ax+b)(cx+d)a c x^{2}+(a d+b c) x+b d=(a x+b)(c x+d),可以找到系数a,b,c,da, b, c, d,这是非常有用的。'

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Q.66

'将下列表达式进行因式分解。'

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Q.67

'从右侧挂带开始'

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Q.68

'(3) \\ [(x-3 y+2 z)(x+3 y-2 z) = \\{x-(3 y-2 z)\\}\\{x+(3 y-2 z)\\} = x^{2}-(3 y-2 z)^{2} =x^{2}-9 y^{2}-4 z^{2}+12 y z]'

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Q.69

'观察方程中的 [ ] 部分,确定其次数和常数项。'

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Q.70

'将以下表达式进行因式分解。(1) x^{6}-1'

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Q.71

'从右侧斜纹开始,6 a^{2}-a b-12 b^{2} =(2 a-3 b)(3 a+4 b)'

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Q.72

'(5) (1-√7+√3)(1+√7+√3) 的值是多少?'

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Q.73

'展开以下表达式:(1) (a+2)^{2} (2) (3 x-4 y)^{2} (3) (2 a+b)(2 a-b) (4) (x+3)(x-5) (5) (2 x+3)(3 x+4) (6) (4 x+y)(7 y-3 x)'

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Q.74

'(2a-5b)^{3}的展开式是:8a^{3}-60a^{2}b+150ab^{2}-125b^{3}'

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Q.75

'请将以下表达式因式分解。'

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Q.76

'展开以下表达式。'

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Q.77

'从右侧横挂的'

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Q.78

'(3)找到与3x^2-2x+1的和为x^2-x的表达式。\n(2)将某些多项式与a^3+2a^2b-5ab^2+5b^3相加时误减了,导致答案变为-a^3-4a^2b+10ab^2-9b^3。请找出正确答案。'

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Q.79

''

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Q.80

'展开以下表达式。'

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Q.81

'展开以下表达式。'

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Q.82

'展开以下方程:(x^2-2xy+4y^2)(x^2+2xy+4y^2)'

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Q.83

'多项式的加法减法乘法运算规则 A、B、C 为多项式。交换律 A+B=B+A,AB=BA 结合律 (A+B)+C=A+(B+C) (AB)C=A(BC) 分配律 A(B+C)=AB+AC (A+B)C=AC+BC 指数律 m、n 为正整数。1. a^m a^n = a^(m+n) 2. (a^m)^n = a^(mn) (参考) a^0 = 1 3. (ab)^n = a^n b^n 展开公式、因数分解: 1. (a+b)^2 = a^2 + 2ab + b^2 (a-b)^2 = a^2 - 2ab + b^2 (a-b)(a^2+ab+b^2) = a^3 - b^3 (a-b)^3 = a^3 - 3a^2b + 3ab^2 - b^3 2. (a+b)(a-b) = a^2 - b^2 3. (x+a)(x+b) = x^2 + (a+b)x + ab 4. (ax+b)(cx+d) = acx^2 + (ad+bc)x + bd (参考) 5. (a+b)(a^2-ab+b^2) = a^3 + b^3 6. (a+b)^3 = a^3 + 3a^2b + 3ab^2 + b^3'

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Q.84

'请分解下列表达式。'

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Q.85

'计算(x+b)(x+c)(b-c)+(x+c)(x+a)(c-a)+(x+a)(x+b)(a-b)。'

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Q.86

'练习:因式分解以下表达式。'

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Q.87

'\\[ (3) \\left(-2 a^{2} b\\right)^{3}\\left(3 a^{3} b^{2}\\right)^{2} =(-2)^{3}\\left(a^{2}\\right)^{3} b^{3} \\times 3^{2}\\left(a^{3}\\right)^{2}\\left(b^{2}\\right)^{2} =-8 a^{2 \\times 3} b^{3} \\times 9 a^{3 \\times 2} b^{2 \\times 2} =-8 a^{6} b^{3} \\times 9 a^{6} b^{4} =(-8) \\cdot 9 a^{6+6} b^{3+4} =-72 a^{12} b^{7} \\]'

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Q.88

''

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Q.89

'对下列表达式进行因式分解:(x+y+1)^{4}-(x+y)^{4}'

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Q.90

'展开以下表达式。'

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Q.91

'(3 x-4 y)(5 y+4 x)'

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Q.92

'当a = \\frac{1+\\sqrt{5}}{2}时,请计算以下表达式的值。\n(1) a^{2}-a-1\n(2) a^{4}+a^{3}+a^{2}+a+1'

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Q.93

'(2)(2p-q)(4p^{2}+2pq+q^{2})'

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Q.94

'请分解以下方程:'

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Q.95

'从右边的袖带'

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Q.96

''

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Q.97

'计算(6)中的值。'

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Q.98

'使用乘法分配法进行因数分解'

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Q.99

'将表达式2(x-1)^{2} - 11(x-1) + 15因式分解。'

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Q.00

''

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Q.01

'(3) \\ [\egin{aligned}(a+b)^{3}(a-b)^{3} & =\\{(a+b)(a-b)\\}^{3}=\\left(a^{2}-b^{2}\\right)^{3} =\\left(a^{2}\\right)^{3}-3\\left(a^{2}\\right)^{2} b^{2}+3 a^{2}\\left(b^{2}\\right)^{2}-\\left(b^{2}\\right)^{3} = a^{6}-3 a^{4} b^{2}+3 a^{2} b^{4}-b^{6} \\]'

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Q.02

'对给定的文本进行多种语言翻译。'

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Q.03

'请计算以下表达式。'

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Q.04

''

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Q.05

'展开给定表达式。'

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Q.06

''

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Q.07

''

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Q.08

'展开以下表达式。'

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Q.09

'展开以下表达式。'

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Q.10

'(3) 展开 \\((x-y)^2(x+y)^2(x^2+y^2)^2\\)。'

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Q.11

'将给定表达式因式分解。'

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Q.12

'展开以下表达式。'

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Q.13

'请将以下表达式进行因式分解。'

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Q.14

''

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Q.15

'\ 14^{9} a^{3} b-a b^{3}+b^{3} c-b c^{3}+c^{3} a-c a^{3} \的因式分解是什么?'

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Q.16

'数学I'

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Q.17

'(t+3)(t-5)'

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Q.18

'(3) \\(a^{2}(b-c)+b^{2}(c-a)+c^{2}(a-b)\\)'

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Q.19

'请因式分解以下表达式。'

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Q.20

'计算下列表达式。(1) (2+√3-√7)^2'

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Q.21

'请因式分解以下表达式。'

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Q.22

''

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Q.23

''

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Q.24

'(1) 展开表达式 (2x + y)^2 + (2x - y)^2\n(2) 展开表达式 (2x + y)^2 - (2x - y)^2\n(3) 展开表达式 (a - b)^2 + (b - c)^2 + (c - a)^2\n(4) 展开表达式 (a + b)^3 - (a - b)^3'

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Q.25

'(3a-b)(9a^2 + 3ab + b^2)'

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Q.26

'请对以下表达式进行因式分解。'

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Q.27

'展开以下表达式。'

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Q.28

'当A=2x^{3}+3x^{2}+5, B=x^{3}+3x+3, C=-x^{3}-15x^{2}+7x时,计算下列式子。'

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Q.29

''

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Q.30

'展开以下表达式。'

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Q.31

'计算以下表达式。(2) (1+√2+√3)(1-√2-√3)'

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Q.32

'将下列表达式转化为 y=a(x-p)^{2}+q 的形式(完全平方)。'

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Q.33

'(5) \\( \\left(x^{2}+3 x y+y^{2}\\right)\\left(x^{2}-3 x y+y^{2}\\right) \\)'

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Q.34

'整理关于最小次数的一个字母。'

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Q.35

'(4x+3y)(16x^2 - 12xy + 9y^2)'

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Q.36

'按照 x 的降幂顺序整理多项式 2xy² + 3x²y² - xy + 4。'

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Q.37

'将给定表达式简化。其中,n是自然数。\n(1) 2(-ab)^n + 3(-1)^(n+1)a^n b^n + a^n(-b)^n\n(2) (a+b+c)^2 - (a-b+c)^2 + (a+b-c)^2 - (a-b-c)^2'

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Q.38

'请因式分解以下方程:\n(1) \\( \\left(a^{2}-b^{2}\\right) x^{2}+b^{2}-a^{2} \\)\n(2) \ x^{2}-40 x-84 \\n(3) \ 8 x^{2}-14 x+3 \\n(4) \ 18 a^{2} b^{2}-39 a b-7 \\n(5) \\( a b x^{2}-\\left(a^{2}+b^{2}\\right) x+a b \\)'

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Q.39

'证明如果a,b,c的对称式中包含a+b,b+c,c+a中的任意一个因子,则其他两个也包含相同的因子。'

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Q.40

'请因式分解以下表达式。'

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Q.41

'关于函数 f(x)=x^2-2ax+a(0 ≤ x ≤ 2):\n(1)求最大值。\n(2)求最小值。'

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Q.42

'(3p+4q)(-3p+4q)'

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Q.43

'因子分解的最终检查。'

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Q.44

''

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Q.45

'将多项式转换为()² - ()²的形式。'

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Q.46

'请因式分解以下表达式。'

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Q.47

'\\( \\sqrt{(-7)^2} \\)'

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Q.48

'将给定表达式因式分解。'

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Q.49

'整理下列多项式的同类项。当注意[]内的字符时,规定其次数和定数项。\n(1) 5 y-4 z+8 x^{2}+5 z-3 x^{2}-6 y+x [x]\n(2) p^{3} q+p q^{2}-2 p^{2}-q^{3}-3 p^{3} q+4 q^{3}+5 [p 和 q], [q]'

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Q.50

'(2) 展开 (x+1)(x-1)(x-2)(x-4)。'

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Q.51

'请因式分解以下方程:\n(1) a(x+1) - (x+1)\n(2) (a-b) x y + (b-a) y^{2}\n(3) 4 p q x^{2} - 36 p q y^{2}\n(4) x^{2} - 8 x - 9\n(5) x^{2} + 5 x y - 14 y^{2}\n(6) 4 a^{2} - 2 a + \\frac{1}{4}'

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Q.52

'简化下列表达式。(1) (cos θ + 2 sin θ)² + (2 cos θ - sin θ)² (0° < θ < 90°)'

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Q.53

'提取公因数。'

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Q.54

'(1) 展开以下表达式:\\( \\left(-2 x^{2} y\\right)^{2}(2 x-3 y) \\)\\n(2) 展开以下表达式:\\( (3 x-y)\\left(x^{2}+x y+y^{2}\\right) \\)\\n(3) 展开以下表达式:\\( \\left(3 x+x^{3}-1\\right)\\left(2 x^{2}-x-6\\right) \\)'

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Q.55

'展开以下表达式。'

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Q.56

'(3x-4y)(5y+4x)'

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Q.57

'请因式分解以下表达式。'

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Q.58

'计算(1)的结果,计算(2)的分母并将其有理化。'

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Q.59

'(x^{8}+x^{7}+x^{6}+x^{5}+x^{3}+x^{2}+x)'

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Q.60

'(4) \ x^{4}+4 \\n\\( x^{4}+4 =\\left(x^{2}\\right)^{2}+4 x^{2}+4-4 x^{2} =\\left(x^{2}+2\\right)^{2}-(2 x)^{2} =\\left\\{\\left(x^{2}+2\\right)+2 x\\right\\}\\left\\{\\left(x^{2}+2\\right)-2 x\\right\\} =\\left(x^{2}+2 x+2\\right)\\left(x^{2}-2 x+2\\right)'

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Q.61

'请因式分解以下表达式。'

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Q.62

'应用基本替换。'

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Q.63

'(2a+5b)(a-3b)'

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Q.64

'展开以下表达式。'

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Q.65

'计算以下内容。(2)到(6)进行展开。'

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Q.66

'(6)\n\\\\[\\\egin{aligned}(1+\\\\sqrt{3})^{3} &= 1^{3}+3 \\\\cdot 1^{2} \\\\cdot \\\\sqrt{3}+3 \\\\cdot 1 \\\\cdot(\\\\sqrt{3})^{2}+(\\\\sqrt{3})^{3} \\\\ &= 1+3 \\\\sqrt{3}+9+3 \\\\sqrt{3} \\\\ &= 10+6 \\\\sqrt{3}\\\\end{aligned}\\\\]'

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Q.67

'请计算以下多项式。 A=5 x^{3}-2 x^{2}+3 x+4,B=3 x^{3}-5 x^{2}+3'

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Q.68

'展开以下表达式。(1) (a-b+c-d)(a+b-c-d)'

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Q.69

'计算下列表达式:(3)(√2+1)^3 + (√2-1)^3'

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Q.70

'展开以下表达式。'

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Q.71

'展开(5) ((x-2)(x+1)(x^2+2x+4)(x^2-x+1))。'

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Q.72

'(2) (a+b+c)^{2}-(a-b+c)^{2}+(a+b-c)^{2}-(a-b-c)^{2}'

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Q.73

'展开以下表达式。'

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Q.74

'(-m+2n)^3'

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Q.75

'(4)计算\\[\egin{aligned}(3+4 \\sqrt{2})(2-5 \\sqrt{2}) &= 6-15 \\sqrt{2}+8 \\sqrt{2}-40 \\\\ &= -34-7 \\sqrt{2}\\end{aligned}\\]'

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Q.76

'(2) \ 48 x^{4}-243 \\n48 x^{4}-243 =3\\left(16 x^{4}-81\\right) =3\\left\\{\\left(4 x^{2}\\right)^{2}-9^{2}\\right\\} =3\\left(4 x^{2}+9\\right)\\left(4 x^{2}-9\\right) =3\\left(4 x^{2}+9\\right)(2 x+3)(2 x-3)'

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Q.77

'按y的降幂顺序整理多项式2xy² + 3x²y² - xy + 4。'

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Q.78

'(3) \\ [ \\开始 \\aligned (2 \\ sqrt{2}-\\ sqrt{27}) ^ {2} & = (2 \\ sqrt{2}) ^ {2}-2 \\倍2 \\ sqrt{2} \\ sqrt{27}+(\\ sqrt{27}) ^ {2} \\\\ & = 8-4 \\ sqrt{2} \\ 3 \\ sqrt{3} +27 \\\\ & = 35-12 \\ sqrt{6}\\ 结束 \\aligned \\]'

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Q.79

'(ア) \\( (4 x-3 y)^{2} \\)\\n(イ) \\( (2 a+3 b)(a-2 b) \\)'

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Q.80

'(3x+y)^3'

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Q.81

'展开以下表达式。(2) (x^{2}+xy+y^{2})(x^{2}-xy+y^{2})(x^{4}-x^{2}y^{2}+y^{4})'

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Q.82

'\\( (a+b+c)^{3} \\)'

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Q.83

'展开以下表达式。(1) (a+2)^{2} (2) (5 x-2 y)^{2} (3) (2 x-3)(2 x+3) (4) (p-7)(p+6) (5) (2 x+3 y)(3 x-4 y) (6) (-a+2 b)(a+2 b)'

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Q.84

'(1) \\(3(a + b)(b + c)(c + a)\\)\\n(2) \\((ab + a + b - 1)(ab - a - b - 1)\\)'

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Q.85

'展开以下表达式。'

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Q.86

'请因式分解以下表达式:(x-1)(x+2)(x-3)(x+4)+24。'

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Q.87

'请因式分解以下表达式。'

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Q.88

'请完成平方公式 y = x^2 - 4x + 3。'

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Q.89

'请因式分解以下表达式。(3) a^{2}(b-c)+b^{2}(c-a)+c^{2}(a-b)'

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Q.90

'(2) \\( \\left(a^{2}-1\\right)\\left(b^{2}-1\\right)-4 a b \\)'

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Q.91

'展开以下表达式。'

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Q.92

'(1) \\((a+b)(a-b)(x+1)(x-1)\\)\\n(2) \\((x+2)(x-42)\\)\\n(3) \\((2 x-3)(4 x-1)\\)\\n(4) \\((3 a b-7)(6 a b+1)\\)\\n(5) \\((a x-b)(b x-a)\\)'

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Q.93

'简化以下表达式。'

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Q.94

'关于矢量a,b,当| a |=2√5,| b |=√2时,a·b=-2'

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Q.95

'(1) \ \\alpha^{5}=1 \ 得到 \ \\quad \\alpha^{5}-1=0 \,即 \\( \\quad(\\alpha-1)(1+\\alpha+\\alpha^{2}+\\alpha^{3}+\\alpha^{4})=0 \\) 由于 \ \\alpha \\neq 1 \ ,所以 \ \\quad 1+\\alpha+\\alpha^{2}+\\alpha^{3}+\\alpha^{4}=0\\ \'

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Q.96

''

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Q.97

'(将给定的文本翻译成多种语言。)'

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Q.98

'令 f(x)=x^{4}+a x^{3}+b x^{2}+c x+d。假设函数 y=f(x) 对某条与 y 轴平行的直线对称。'

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Q.99

'Hamilton-Cayley定理'

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Q.00

'124(1)f1(x)=1+x,f2(x)=1+x+x2,f3(x)=1+x+x2+x3 f_{1}(x)=1+x, f_{2}(x)=1+x+x^{2}, f_{3}(x)=1+x+x^{2}+x^{3} (2)fn(x)=1+x+x2+cdotscdots+xn f_{n}(x)=1+x+x^{2}+\\cdots \\cdots+x^{n} ,证明略(3)1'

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Q.01

'因此,S2=frac14left(a2+b2right)left(a2+c2right)a4=frac14left(a2b2+b2c2+c2a2right) S^{2} = \\frac{1}{4}\\{\\left(a^{2}+b^{2}\\right)\\left(a^{2}+c^{2}\\right)-a^{4}\\} = \\frac{1}{4}\\left(a^{2} b^{2}+b^{2} c^{2}+c^{2} a^{2}\\right) ,而S1=frac12ab S_{1} = \\frac{1}{2} a b S2=frac12bc S_{2} = \\frac{1}{2} b c S3=frac12ca S_{3} = \\frac{1}{2} c a ,所以S12+S22+S32=left(frac12abright)2+left(frac12bcright)2+left(frac12caright)2=frac14left(a2b2+b2c2+c2a2right)S_{1}{ }^{2}+S_{2}{ }^{2}+S_{3}{ }^{2} = \\left(\\frac{1}{2} a b\\right)^{2}+\\left(\\frac{1}{2} b c\\right)^{2}+\\left(\\frac{1}{2} c a\\right)^{2} = \\frac{1}{4}\\left(a^{2} b^{2}+b^{2} c^{2}+c^{2} a^{2}\\right),因此S2=S12+S22+S32 S^{2} = S_{1}{ }^{2}+S_{2}{ }^{2}+S_{3}{ }^{2} '

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Q.02

'(2)\n\\[ \egin{aligned} (A+B)(A-B) & =A(A-B)+B(A-B) \\\\ & =A^{2}-A B+B A-B^{2} \\end{aligned} \\]'

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Q.03

'(A+2 B)(A-2 B)\n\n =A(A-2 B)+2 B(A-2 B)\n\n =A^{2}-2 A B+2 B A-4 B^{2}'

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Q.04

'(5) 数列 {\\cos n \\pi} 是 {-1,1,-1,1, \\cdots \\cdots}。因此,它是振荡的(没有极限)。'

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Q.05

'在数学 C 中,对于范围为 -2 ≤ k ≤ 2,当 k=-2 时,|p| 的最大值为 √(8+4+13)=√25=5,当 k=1/2 时,最小值为 √(25/2)=5/√2。'

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Q.06

'对于非零常数a,考虑函数f(x)=ax(1-x)。如果g(x)=f(f(x)),那么证明多项式g(x)-x可以被多项式f(x)-x整除。'

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Q.07

'(1) \ a_{1}=1, \\quad a_{2}=i, \\quad a_{n+2}=a_{n+1}+a_{n} \ 得出 \ \\quad a_{3}=1+i, a_{4}=1+2 i \ 因此 \ \\quad b_{1}=i, \\quad b_{2}=\\frac{1+i}{i}=1-i \'

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Q.08

'(B-C)^{2}=B^{2}-B C-C B+C^{2} \\n\\n (A+B-2 C)^{2}=(A+B-2 C)(A+B-2 C) \\n \A^{2}+A B-2 A C+B A+B^{2}-2 B C-2 C A-2 C B+4 C^{2} \'

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Q.09

'由于A-E = \egin{array}{cc} -2 & 2(k+1) \\\\ k+4 & k^{2}-4 k-10 \\end{array},求解使得(A-E)^{2}(矩阵运算)的(1,2)元素和(2,1)元素都为0的k的值。'

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Q.10

'由(3)知,数列{an}是首项a1,公比e^-π的等比数列,因此'

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Q.11

'定义 f(x) 和 g(x) 的复合函数 f(g(x)) 为 (f ∘ g)(x)。'

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Q.12

'(3) \\ n\\\\[ \\ \\ begin{align} (2 A+E)(A-3 E) & =2 A(A-3 E)+ E(A-3 E) \\\\ & =2 A ^{2}-6 A E+E A-3 E ^{2} \\\\ & =2 A ^{2}-6 A+A-3 E \\\\ & =2 A ^{2}-5 A-3 E \\\\ end{align} \\]'

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Q.13

'将给定文本翻译成多种语言。'

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Q.14

'170 (2) (ア) f(0)=0'

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Q.15

'设 s, t 是满足 s < t 的实数。在坐标平面上,有 3 个点 A(1,2), B(s, s^{2}), C(t, t^{2}) 共线。(1) 求 s 和 t 之间的关系式。(2) 将线段 BC 的中点记为 M(u, v),求 u 和 v 之间的关系式。(3) 当 s 和 t 变化时,求 v 的最小值以及此时的 u, s, t 的值。'

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Q.16

'当曲线 y=x^{3}+a x 和 y=b x^{2}+c 都通过点 (-1,0),且在该点有共同切线时,求常数 a, b, c 的值。并求出在接点处的共同切线方程。'

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Q.17

'展开表达式1+x)(12x5 (1+x)(1-2 x)^{5} ,并求 x2,x4,x6 x^{2}, x^{4}, x^{6} 上的每项系数之和。'

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Q.18

'函数f(x)= x ^ 3-6x ^ 2 + 9x-2或f(x)= -x ^ 3 + 6x ^ 2-9x + 2'

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Q.19

'求展开式中的常数项。'

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Q.20

'确定常数 a、b、c、d 的值,使得等式成为关于 x 的恒等式。'

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Q.21

'利用底数转换公式进行表达式的变形'

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Q.22

'在给定的展开式中,找出[]内指定项的系数。(1) (1+2 a-3 b)^{7} [a^{2} b^{3}] (2) (x^{2}-3 x+1)^{10} [x^{3}]'

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Q.23

'展开 (x+5)^{80},找出哪个数是 x 的最大幂数。'

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Q.24

'展开以下表达式。'

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Q.25

'为了使上述等式在 x 上成立,找出常数 a、b、c、d 的值。'

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Q.26

'(3) \\( \\left(x^{2}+\\frac{1}{x}\\right)^{10} \\)的展开式的一般项是什么?'

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Q.27

'证明等式a + b + c = 0成立时,证明以下等式成立。'

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Q.28

'練習證明當a + b + c = 0時,下列等式成立。'

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Q.29

'对于方程x23x+7=0x^{2}-3 x+7=0的两个解alpha,\eta\\alpha, \eta, 求alpha2+\eta2\\alpha^{2}+\eta^{2}alpha4+\eta4\\alpha^{4}+\eta^{4}的值。另外,求(329)left(alpha2+3alpha+7right)left(\eta2\eta+7right)(3-29)\\left(\\alpha^{2}+3 \\alpha+7\\right)\\left(\eta^{2}-\eta+7\\right)的值。根据解和系数的关系,alpha+\eta=3\\alpha+\eta=3, alpha\eta=7\\alpha \eta=7。因此,alpha2+\eta2=(alpha+\eta)22alpha\eta=322cdot7=5\\alpha^{2}+\eta^{2}=(\\alpha+\eta)^{2}-2 \\alpha \eta=3^{2}-2 \\cdot 7=-5alpha4+\eta4=left(alpha2+\eta2right)22(alpha\eta)2=(5)22cdot72=73\\alpha^{4}+\eta^{4}=\\left(\\alpha^{2}+\eta^{2}\\right)^{2}-2(\\alpha \eta)^{2}=(-5)^{2}-2 \\cdot 7^{2}=-73。另外,由方程x23x+7=0x^{2}-3 x+7=0的解alpha,\eta\\alpha, \eta可得alpha23alpha+7=0\\alpha^{2}-3 \\alpha+7=0, \eta23\eta+7=0\eta^{2}-3 \eta+7=0。因此,alpha2=3alpha7\\alpha^{2}=3 \\alpha-7, \eta2=3\eta7\eta^{2}=3 \eta-7。由于alpha2+\eta2\\alpha^{2}+\eta^{2}alpha4+\eta4\\alpha^{4}+\eta^{4}是对称式,可以用基本对称式alpha+\eta,alpha\eta\\alpha+\eta, \\alpha \eta表示。通过降阶计算。'

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Q.30

'当曲线 y=x^{3}-x^{2}-12 x-1 和 y=-x^{3}+2 x^{2}+a 相切时,求常数 a 的值。并求出在那个切点处的切线方程。'

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Q.31

'求展开式中的x15x^{15}的系数。'

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Q.32

'在求解 7 个整数问题时使用二项式定理'

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Q.33

'练习:简化以下表达式。'

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Q.34

'(1+2 a-3 b)^{7}\\left[a^{2} b^{3}\\right]'

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Q.35

'数学 \ \\Pi \(1)中出现的常数项为k=0,2,4,6时,\n\n {}_{7} \\mathrm{C}_{0} \\cdot 1 + {}_{7} \\mathrm{C}_{2} \\cdot {}_{2} \\mathrm{C}_{1} + {}_{7} \\mathrm{C}_{4} \\cdot {}_{4} \\mathrm{C}_{2} + {}_{7} \\mathrm{C}_{6} \\cdot {}_{6} \\mathrm{C}_{3} = 1 + 42 + 210 + 140 = 393 \\quad \\leftarrow {}_{7} \\mathrm{C}_{4} = {}_{7} \\mathrm{C}_{3}, {}_{7} \\mathrm{C}_{6} = {}_{7} \\mathrm{C}_{1}'

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Q.36

'求(2+a)^2的展開式和係數'

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Q.37

'设n为正整数,并考虑多项式P(x)=x^{3n}+(3n-2)x^{2n}+(2n-3)x^{n}-n^{2}。'

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Q.38

''

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Q.39

'(4) \\( \\left(2 x^{4}-\\frac{1}{x}\\right)^{10} \\)的展开式的一般项是什么?'

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Q.40

'241 (1) f(x)=x^{2}-\\frac{3}{2}\n(2) f(x)=3 x+1'

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Q.41

'恒等式是指包含哪个值, 只要等式的两边的值存在, 该等式始终成立. 根据恒等式的性质回答以下问题。'

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Q.42

'确定常数a、b、c的值,使等式 \\( \\frac{1}{(x+1)(x+2)(x+3)}=\\frac{a}{x+1}+\\frac{b}{x+2}+\\frac{c}{x+3} \\) 对于所有x成立。'

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Q.43

'请分解以下复合462次和二次方程式。请在复数范围内分解以下方程:(1) 2x ^ 2-3x + 4 (2) x ^ 4-64 (3) x ^ 4 + 4x ^ 2 + 36'

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Q.44

'请使用以下公式展开(a-b)^3。'

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Q.45

'找到使得多项式 \ x^{4}-4 x^{3}+a x^{2}+x+b \ 成为某个平方多项式的常数 \ a \ 和 \ b \ 的值。'

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Q.46

'求解以下表达式展开中的指定内容。'

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Q.47

'在展开式中找到指定项的系数。'

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Q.48

''

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Q.49

'确定常数a、b、c的值,使得等式关于x成立。(2)'

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Q.50

'(1) 脣本 1 二項展開式'

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Q.51

'对于正整数n,求(x+1/x)^n的展开式中包含常数项的条件。'

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Q.52

'请证明以下等式:\n(1) \\( (x-2)\\left(x^{5}+2 x^{4}+4 x^{3}+8 x^{2}+16 x+32\\right)=x^{6}-64 \\)\n(2) \\( \\left(a^{2}+b^{2}+c^{2}\\right)\\left(x^{2}+y^{2}+z^{2}\\right)-(a x+b y+c z)^{2} = (a y-b x)^{2}+(b z-c y)^{2}+(c x-a z)^{2} \\)'

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Q.53

'证明等式 (a^2 + b^2)(c^2 + d^2) = (ac + bd)^2 + (ad - bc)^2。'

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Q.54

'练习'

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Q.55

'请因式分解以下表达式。'

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Q.56

'57(a(2θ-Σθ), a(2-余θ))'

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Q.57

'请将不可能函数 y=\\sqrt{ax+b} 转换为 y=\\sqrt{a(x-p)} 的形式,并解释这种变化会如何影响图形。'

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Q.58

'270 (1) \\((x+y)^{2}=2 x+A \\)(A为任意常数)\\n(2) \y=x-\\frac{A e^{2 x}-1}{A e^{2 x}+1} \(A为任意常数), y=x-1\\n\\(271 y=x^{2}(x>0) \\) 或者 \\( y=\\frac{1}{x^{2}} \\quad(x>0) \\)'

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Q.59

'关于练习(284\n(1)\\( f(x)=x-1, g(x)=-2 x+3, h(x)=2 x^{2}+1 \\),求以下内容。\n(T)\\( (f \\circ g)(x) \\)\n(イ)\\( (g \\circ f)(x) \\)\n(ら)\\( (g \\circ g)(x) \\)\n(I)\\( ((h \\circ g) \\circ f)(x) \\)\n(J)\\( (f \\circ(g \\circ h))(x) \\)\n(2)关于函数\\( f(x)=x^{2}-2 x, g(x)=-x^{2}+4 x \\),求合成函数\\( (g \\circ f)(x) \\)的定义域和值域。'

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Q.60

'求 1+x+x^2+⋯+x^n 的和。(2)求导数结果为 x,求和 1+2x+3x^2+⋯+n x^{n-1}。(3)利用此结果,求无限级数的和 Σ_{n=1}^{∞} n/2^n。'

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Q.61

'(1) \ 2 \\sqrt{x^{2}+x}+C \'

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Q.62

'(3) frac23left(x2+x+1right)sqrtx2+x+1+C \\frac{2}{3}\\left(x^{2}+x+1\\right) \\sqrt{x^{2}+x+1}+C '

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Q.63

'在数学问题解决过程中,描述和公式的定义时应注意的要点是什么?'

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Q.64

''

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Q.65

'(1) 求出矩阵 AA 无逆矩阵的条件。\\[1em] \\[A=\\left(\egin{array}{ll}a & 1-a \\\\ a & 1-a\\end{array}\\right)\\]'

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Q.66

'(2) 一般形 x²+y²+z²+Ax+By+Cz+D=0 但是 A²+B²+C²>4D 解释 (2) (1) 的方程式 (x-a)²+(y-b)²+(z-c)²=r² 展开并整理得 x²+y²+z²-2ax-2by-2cz+a²+b²+c²-r²=0 -2a=A,-2b=B,-2c=C, a²+b²+c²-r²=D 记作 x²+y²+z²+Ax+By+Cz+D=0'

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Q.67

'令 k 为自然数。当无穷级数 sumn=1inftyleft(cosx)n1(cosx)n+k1 \\sum_{n=1}^{\\infty}\\left\\{(\\cos x)^{n-1}-(\\cos x)^{n+k-1}\\} 对所有实数 x x 收敛时,将这个无穷级数的和记为 f(x) f(x) 。 (1) 求 k k 的条件。 (2) 证明函数 f(x) f(x) x=0 x=0 处不连续。'

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Q.68

''

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Q.69

''

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Q.70

'给定三个点A(2,0,0),B(12,5,10),C(p,1,8)。当内积AB·AC=45时,p的值是多少。这时,AC的长度是多少,三角形ABC的面积是多少。此外,当p=M时,点Q与三点A、B、C等距离于zx平面上,点Q的坐标是什么。'

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Q.71

'95 (1) \ \\\\frac{1}{3} \\\\tan^{3} x + \\\\tan x + C \'

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Q.72

'将次数降低并转换为一次式。'

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Q.73

'计算以下值:\n(1) \\sum_{k=1}^{n} k^2'

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Q.74

'(2) 当 \\( \\vec{a}=(-1,2), \\vec{b}=(-5,-6) \\) 时,用 \ \\vec{a} \ 和 \ \\vec{b} \ 表示 \\( \\vec{c}=\\left(\\frac{5}{2},-7\\right) \\)。'

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Q.75

'整理第1章函数(1),得到 8x^4-8x^2-x+1=0。定义 P(x)=8x^4-8x^2-x+1,那么 P(1)=0,P(-1/2)=0。因此,P(x) 的因数之一是 (x-1)(2x+1),从而得到 (x-1)(2x+1)(4x^2+2x-1)=0,因此 x=-1/2, 1, -1±√5/4。由此得出 -√2/2 ≤ x ≤ √2/2,因此 x=-1/2, -1+√5/4。'

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Q.76

'(1) 求解当 x \\neq 1 时,求和 1+x+x^{2}+\\cdots \\cdots+x^{n}。\n(2) 通过将 (1) 中的结果视为 x 的函数并求微分,求解当 x \\neq 1 时,求和 1+2 x+3 x^{2}+\\cdots \\cdots+n x^{n-1}。'

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Q.77

'(2) vece=(3,4,7)\\vec{e}=(3,4,7)\\n\\n(2) vece=sveca+tvecb+uvecc\\vec{e}=s \\vec{a}+t \\vec{b}+u \\vec{c}(3,4,7)=(s+2tu,2s+3t,5s+t+u) (3,4,7)=(s+2t-u,2s+3t,-5s+t+u)\\n\\n因此\\n\\\n\\\egin{\overlineray}{l}\\ns+2 t-u=3 \\\\ \\n2 s+3 t=4 \\\\ \\n-5 s+t+u=7 \\n\\end{\overlineray}\\n \(5)+(7) (5) + (7) 得 -4 s+3 t=10n(6)(8)\\n(6)-(8) 得 6 s=-6n因此\\n因此 s=-1nn,(8)\\n\\n故, (8) 得 t=2进一步,(5) 进一步, (5) 得 u=0n\\n故 \\vec{e}=-\\vec{a}+2 \\vec{b}$'

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Q.78

'由于 G 和 H 相等,即 g=h,因此 {t(1-t)-(1-t)2} a+{t2-t(1-t)} b+{(1-t)2-t2} c=0,从而 (-2t2+3t-1) a+(2t2-t) b+(1-2t) c=0。在此处,(-2t2+3t-1)+(2t2-t)+(1-2t)=0 成立,因此,通过(1)所示的内容,我们可以得出 -2t2+3t-1=0, 1-2t=0⋯⋯⋅(1),2t2-t=0。(3) 由于 t=1/2 满足(1)和(2),而除了 t=1/2 之外的任何值均不满足(3)。因此 t=1/2 时,AD、BE、CF 是三角形 ABC 的中位线,并且三点 G、H、I 是三角形 ABC 的重心,因此它们确实是重合的。因此,所求的 t 值为 t=1/2。'

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Q.79

'109 (1)我(m,0)=\x0crac{(b-a)^{m+1}}{m+1}, I(1,1)=-\x0crac{(b-a)^{3}}{6}'

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Q.80

'对于非零常数 a,考虑函数 f(x)=ax(1-x)。如果令g(x)=f(f(x)),则多项式g(x)-x能被多项式f(x)-x整除。'

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Q.81

'请问您需要关于这幅图的什么信息?'

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Q.82

'(1) X = \\frac{s+t}{2}, Y = s \\cdot t (2) 证明略, \\[ 2 x^{2} - 2\\left(y + \\frac{3}{4}\\right)^{2} = -1\\left(y < -\\frac{1}{4}\\right) \\]'

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Q.83

'给定实数 p、q,定义数列{an},{bn}(n=1,2,3,...)如下。\ \\left\\{ \egin{\overlineray}{l} a_{1}=p, \\quad b_{1}=q \\ a_{n+1}=pa_{n}+qb_{n} \\ b_{n+1}=qa_{n}+pb_{n} \\end{\overlineray} \\right. \ [Kinki University] (1) 令 p=3, q=-2。此时,a_{n}+b_{n}=力 \\square,a_{n}-b_{n}=イ \\square。(2) 令p+q=1。此时,a_{n}可用p表示,a_{n}=才 \\square。数列{an}收敛的充分必要条件是力 \\square<p≤キ \\square。它的极限值是力 \\square<p<あ \\square时 \\lim_{n \\rightarrow \\infty} a_{n}=ク \\square。\ p=キ \\square \时 \\lim_{n \\rightarrow \\infty} a_{n}=ケ\\quad。'

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Q.84

'设PR (n)为自然数。在(n-1)π≤x≤nπ的范围内,曲线y=x sin x与x轴围成的部分面积为Sn。 (1)用n的表达式表示Sn。(2)求无限级数Σn=1∞(1/(SnSn+1))的和。'

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Q.85

'设6 f(x)=x^{4}+a x^{3}+b x^{2}+c x+d。假设函数 y=f(x) 对某条与y轴平行的直线对称。(1) 求实数a, b, c, d 满足的关系式。(2) 证明函数 f(x) 是两个二次函数的复合函数。'

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Q.86

'以 89 的例题,画出用媒介变量表示的函数的图形'

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Q.87

'(2) 令Q(a+bi) (a, b 是实数)。则 AQ^2 = |(a + bi) - (-2 - 2i)|^2 = |(a + 2) + (b + 2)i|^2 = (a + 2)^2 + (b + 2)^2。BQ^2 = |(a + bi) - (5 - 3i)|^2 = |(a - 5) + (b + 3)i|^2 = (a - 5)^2 + (b + 3)^2。CQ^2 = |(a + bi) - (2 + 6i)|^2 = |(a - 2) + (b - 6)i|^2 = (a - 2)^2 + (b - 6)^2 = 由 BQ 得 AQ^2 = BQ^2 因此 (a + 2)^2 + (b + 2)^2 = (a - 5)^2 + (b + 3)^2。'

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Q.88

'当点P沿数轴运动时,其坐标在时间t处为x=t^{3}-6t^{2}-15t(t≥0),求:\n(1) 在t=3时点P的速度、速率和加速度\n(2) 当P改变运动方向时,点P的坐标'

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Q.89

'令k是自然数。级数Σn=1∞{(cos x)^n-1 - (cos x)^n+k-1}对于所有实数x收敛,级数和为f(x)。 (1)找出k的条件。(2)证明函数f(x)在x = 0处不连续。'

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Q.90

'请阐述无限等比数列的收敛条件。'

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Q.91

'将给定的文本翻译成多种语言。'

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Q.92

'重要例题 22 数字的排列\n将 5 位数的整数 n 的各个位数,从最高位到最低位分别记为 a, b, c, d, e。求满足以下条件的整数 n 的个数:\n(1) a>b>c>d>e\n(2) a<b<c<d<e\n(3) a ≤ b ≤ c ≤ d ≤ e\n(4) a<b<c<d, d ≥ e'

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Q.93

'练习38\n(1) 证明:\\((p+q)-(p-q)=2q\\)\n(2) 解法:\\((p-q)(p+q)=2^2 \\cdot 5^2\\)\n(3) 解法:\\((p-q)(p+q)=2 \\cdot 5^3\\)\n(4) 解法:\\((p-q)(p+q)=2^4 \\cdot 3 \\cdot 5^4 \\cdot 7\\)'

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Q.94

'因式分解以下表达式:3a^2b - 9ab^2 - 15abc'

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Q.95

'在 x=1+√3 的情况下,求 P=x^{4}-2 x^{3}-x^{2}-x 的值。'

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Q.96

'请展示简化表达式(1)的方法。'

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Q.97

'展开以下表达式。'

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Q.98

'40(1)\\( y = \\frac{4}{3}(x-1)^{2} + \\frac{17}{3} \\)\\n\\[\\left(y=\\frac{4}{3} x^{2}-\\frac{8}{3} x+7\\right)\\]\\n(2)\\( y = -2(x+3)(x-1) \\quad\\left(y=-2 x^{2}-4 x+6\\right) \\)'

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Q.99

'因式分解下列表达式:3ab - 2ac'

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Q.00

'计算下列表达式。'

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Q.01

'展开(x-2)(x+1)(x+2)(x+5)。'

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Q.02

'对于所有实数x,由于(2x-1)^2≥0,所以不存在解。'

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Q.03

'请简化(a+b)^2 - c^2和(a-b)^2 - c^2的乘积。'

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Q.04

'将相邻的两个红色球用R表示,所求排列为R和2个蓝色球,3个白色球的排列。'

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Q.05

'(2 x+1)(x-3) \\leq 0所以 所以 -\\frac{1}{2} \\leq x \\leq 3'

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Q.06

'(6) \\(\\left(2 x^{2}+x y+3 y^{2}\\right)\\left(2 x^{2}-x y+3 y^{2}\\right) \\)'

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Q.07

'(3x - 2y)(3x + 2y)的展开形式是9x^2 - 4y^2'

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Q.08

'(4)\n(x+1)(x+2)(x+9)(x+10)-180\n= {(x+1)(x+10)}{(x+2)(x+9)}-180\n= (x²+11x+10)(x²+11x+18)-180\n= (x²+11x)²+28(x²+11x)+180-180\n= (x²+11x)²+28(x²+11x)\n= (x²+11x)\\{(x²+11x)+28\\}\n= x(x+11)(x+4)(x+7)'

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Q.09

'请因式分解以下方程:(6) x^2 - 9x + 14'

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Q.10

'整理多项式 -2x+3y+x^{2}+5x-y 的同类项。'

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Q.11

'请因式分解以下表达式:9x^2 - 30xy + 25y^2'

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Q.12

'(a^{2} + ab + b^{2})(a^{2} - ab + b^{2})的展开是a^{4} - a^{2}b^{2} + b^{4}'

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Q.13

''

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Q.14

'请因式分解以下数学表达式:'

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Q.15

'(x+2y-3z)^{2} 展开式为 x^{2}+4xy-6xz+4y^{2}-12yz+9z^{2}'

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Q.16

'请分解以下方程式。'

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Q.17

'展开以下公式。'

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Q.18

'把给定文本翻译成多种语言。'

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Q.19

''

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Q.20

'练习42\n(2)\n\\( \egin{aligned}M & =-5\\left(a^{2}-2 a\\right) \\\\ & =-5\\left(a^{2}-2 a+1^{2}-1^{2}\\right) \\\\ & =-5(a-1)^{2}+5 \\end{aligned} \\)'

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Q.21

'(x+y-z)(x-y+z)的展开是x^2 - y^2 + z^2 - xy + xz - yz'

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Q.22

'将以下表达式进行因式分解。'

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Q.23

'请完成以下二次方程的平方'

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Q.24

'有很多一张面值为 500 日元、100 日元和 10 日元的硬币。请计算使用这三种硬币支付 1200 日元的方式数量。可以不使用某些硬币。'

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Q.25

'(与式) = 2 * 4x^2 + {2 * (-1) + 3 * 4}x + 3 * (-1)'

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Q.26

'计算以下表达式。'

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Q.27

'(与式) = (-2x)^2 + 2(-2x) ⋅ 5y + (5y)^2'

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Q.28

'在给定多项式中,找出方括号内的项的次数和常数项。'

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Q.29

'请计算以下排列:\n(1) 5P3_{5}P_{3}\n(2) 5P5_{5}P_{5}\n(3) 求选出委员长、副委员长和书记的总方法数。'

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Q.30

'从6个不同的物品中取出4个物品的排列数为6P4{}_6P_4,因为作为循环排列时有相同的物品4个'

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Q.31

'展开(x+2)(x-2)(x^2+4)。'

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Q.32

'请解决整理同类项和解决次数和常数项的问题。'

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Q.33

'请因式分解以下方程:'

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Q.34

'请将以下表达式进行因式分解。'

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Q.35

'考虑在16个坐标(1,1),(1,2),(1,3),(2,1),(2,2),(2,3),(3,1),(3,2),(3,3)表示的九个格点中选择三个不同的格点,并用直线连接它们以形成图形。 (1)有多少种选择三个格点的方式?(2)当所有(1)的组合以相等的概率选择时,求被选择的三个点组成三角形的概率。(3)当所有(1)的组合以相等的概率选择时,求被选择的三个点组成钝角三角形的概率。'

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Q.36

'(2) \\( (a+1)(b+1)(c+1) \\)'

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Q.37

'(与式) = 3abc ⋅ a - 3abc ⋅ 2b + 3abc ⋅ 3c'

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Q.38

'(2x)^3 - 3(2x)^2 ⋅ 3y + 3 ⋅ 2x(3y)^2 - (3y)^3'

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Q.39

'(Difference of squares) = 3a(a^2 - 4ab - b^2) - 2b(a^2 - 4ab - b^2)'

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Q.40

'(x + 1)(x - 1)(x^{2} + x + 1)(x^{2} - x + 1) 的展开是:x^2 - 1'

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Q.41

'请因式分解以下表达式。'

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Q.42

'從15個焦點中選擇3個的方法有15C3種。如右圖所示,直線l_k(k=1,2,3,4)中,三個點無法形成三角形是當3個點位於下一條直線上時。當三個點在l_1上或與l_1平行的直線上時,有5條這樣的直線,對於每條直線,有3C3種選擇3個點的方式。因此,選擇3個點的方式是5 × 3C3 = 5(種)。當三個點在l_2上或與l_2平行的直線上時,與第一種情況相同,3 × 5C3 = 3 × 10 = 30。當三個點在l_3上或與l_3平行的直線上時,如同第一種情況,3 × 3C3 = 3。當三個點在l_4上或與l_4平行的直線上時,當三個點在l_5或l_6上時,有2 × 3C3 = 2(種方式)。'

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Q.43

'(2) 将x3+3xy+y31x^{3}+3xy+y^{3}-1进行因式分解。'

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Q.44

'展开以下表达式:a^3 + 3a^2(b+c) + 3a(b+c)^2 + (b+c)^3 - a^3 - b^3 - c^3'

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Q.45

'请选择三名进入组A,然后选择三名进入组B,最后选择三名进入组C的方法总数。'

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Q.46

'将下列表达式进行因式分解:4x^2 - 1'

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Q.47

'练习 7 -> 本册 p.59 (1) \\((a+b+c)^{2} = a^{2} + b^{2} + c^{2} + 2(a b + b c + c a)\\) 所以 \\[ \egin{aligned} 2(a b + b c + c a) &= (a + b + c)^{2} - \\left(a^{2} + b^{2} + c^{2}\\right) = 1^{2} - 4 = -3 \\end{aligned} \\] 因此 \ \\quad a b + b c + c a = -\\frac{3}{2} \'

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Q.48

'(x ^ 3 + 3x - 2)(2x ^ 2 - x - 3) =(x ^ 3 + 3x - 2)(2x ^ 2 - x - 3)'

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Q.49

'将8个苹果分成4袋(可以有某些袋为空)的方法有多少种?'

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Q.50

'展开(x^3-x^2+2x-3)(x^3+2x^2-4x-3)。'

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Q.51

'对于(3) ac6b2c2ac^6 - b^2c^2,请计算系数和次数。'

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Q.52

'排列组合与递推式'

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Q.53

'展开 (x^{2}-2 x - 3)^{2}。'

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Q.54

''

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Q.55

'证明所有系数为整数的三次多项式 f(x) 中 x^3 的系数为1时,条件 (A) 和 (B) 是等价的。'

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Q.56

'如果不考虑地点名称,有多少种涂色方式可以将这 5 种颜色分开?'

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Q.57

'(与式) = (2x + 1){(2x)^2 - 2x ⋅ 1 + 1^2}'

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Q.58

'请分解以下表达式。'

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Q.59

'展开表达式(2)的每一项是在x,y,z中取6个数,允许重复,并将它们相乘得到。'

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Q.60

'8 圆排列・项链排列 (2)\n(1)将 6 个数字 1,2,3,4,5,6 排成一个圆形时,相邻的数字 1 和 2 有 A 种排列方式,而相对的 1 和 2 的排列方式有 B 种。\n(2) 当 4 名男子和 3 名女子坐在圆形的桌子旁时,女子的两侧必定坐着男子的排列方式总共有 C 种。'

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Q.61

'展开以下表达式。'

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Q.62

'将以下方程进行因式分解。请注意选择因子的方式。'

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Q.63

'展开以下方程:(x^4 - 2x^2y^2 + y^4)a^2 + 2b(x^4 - y^4)a + b^2(x^4 - 2x^2y^2 + y^4)'

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Q.64

'因式分解下列方程:(2) x^2y - 5xy^2'

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Q.65

'-a^{2}b^{2}+2ab+a-5b+1'

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Q.66

'因式分解下列方程:(1) a^2 + 18a + 81'

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Q.67

'练习 展开以下表达式。'

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Q.68

'请因式分解下列方程:(5)x^2 + 5x + 6'

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Q.69

''

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Q.70

'(3)\n\\[\n\egin{aligned}\n2xy-2x-5y &= 2x(y-1)-5(y-1)-5 \\\\ &= (2x-5)(y-1)-5\n\\end{aligned}\n]\\n因此,等式为\\((2x-5)(y-1)=5\\)。由于x,y是整数,所以2x-5,y-1也是整数。因此\\((2x-5, y-1)=(1,5), (5,1), (-1,-5), (-5,-1)\\)。因此\n\\[\n(x,y)=(3,6),(5,2),(2,-4),(0,0)\n]'

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Q.71

'将左边分解成因式 (x+2)(2x-1)=0。因此 x+2=0 或者 2x-1=0。因此 x=-2, 1/2。'

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Q.72

'(1-a)(1+a+a^{2})(1+a^{3}+a^{6}) 的展开是什么?'

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Q.73

'检查4 => 本册 p .25\n(1) 3ab-2ac=a(3b-2c)\n(2) x^2 y-5xy^2=xy(x-5y)\n(3) 3a^2b-9ab^2-15abc=3ab(a-3b-5c)'

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Q.74

'(3) \\( (a-b)(b-c)(c-a) \\)'

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Q.75

'请因式分解以下表达式。'

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Q.76

'展开以下表达式:sqrt(1 + x) - sqrt(1 - x)'

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Q.77

'请因式分解以下表达式。'

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Q.78

'(3)\n(x-2)(x-4)(x+1)(x+3)+24\n= {(x-2)(x+1)}{(x-4)(x+3)}+24\n= (x²-x-2)(x²-x-12)+24\n= (x²-x)²-14(x²-x)+24+24\n= (x²-x)²-14(x²-x)+48\n= {(x²-x)-6}{(x²-x)-8}\n= (x²-x-6)(x²-x-8)\n= (x+2)(x-3)(x²-x-8)'

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Q.79

'(1) f(2)=223cdot2+2=46+2=0 f(2)=2^{2}-3 \\cdot 2+2=4-6+2=0 \n(2) f(1)=(1)23cdot(1)+2=1+3+2=6 f(-1) =(-1)^{2}-3 \\cdot(-1)+2 =1+3+2=6 '

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Q.80

'综合练习'

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Q.81

'(与式) = x^2 +(-2y + 3y)x + (-2y) ⋅ 3y'

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Q.82

'请分解以下表达式。'

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Q.83

'展开以下表达式:sqrt(a^2 + 2a + 1) - sqrt(a^2 - 6a + 9)'

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Q.84

'考虑多项式 f(x)=a+bx+cx^2+dx^3。对于任意整数x,要求f(x)为整数88的充分必要条件是上整数a,b+c+d,2c,6d都是整数。'

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Q.85

'请因式分解以下表达式。'

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Q.86

'如果通过3点的直线分别为直线y=x、y=x+1和y=x-1,则当直线为y=x+k(k= ± 1)时,从直线y=x+k上选择所有3个点,再从不在直线y=x+k上的13个点中选择1个点。另外,如果直线为y=x,则从直线y=x上的4个点中选择3个点,再从不在直线y=x上的12个点中选择1个点。因此,2×组合数3取3×13+组合数4取3×12=26+48=74(种可能)。'

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Q.87

将以下表达式因式分解。 (1) \( \left(x^{2}+3 x ight)^{2}-2\left(x^{2}+3 x ight)-8 \) (2) \( \left(x^{2}+5 x ight)\left(x^{2}+5 x-20 ight)-96 \) (3) \( (x-1) x(x+1)(x+2)-24 \)

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Q.88

多项式的积是通过使用分配律来计算的。 例: \((x+2)(x+5)\)

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Q.89

(2)\( 2(x-3)^{2}+(x-3)-3 \)

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Q.90

将以下表达式因式分解。 (1) x4+5x2+9 x^{4}+5 x^{2}+9 (2) x412x2y2+16y4 x^{4}-12 x^{2} y^{2}+16 y^{4}

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Q.91

给定一个常数 a,考虑函数 f(x)=(1+2a)(1-x)+(2-a)x 。因为 f(x)=(-a+ √a +)x+2a+1,在 0 ≤ x ≤ 1 时,该函数的最小值 m(a) 如下: 当 a < rac{1}{P} 时,m(a) = U 当 a = rac{1}{P} 时,m(a) = B

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Q.92

将以下表达式因式分解。 (1) a2b+b2cb3a2c a^{2} b+b^{2} c-b^{3}-a^{2} c (2) 1+2ab+a+2b 1+2 a b+a+2 b

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Q.93

展开(x+1)(x+2)(x+3)(x+4)。

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Q.94

将以下表达式因式分解。 (1) a4b4 a^{4}-b^{4} (2) x413x2+36 x^{4}-13 x^{2}+36

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Q.95

将下列表达式因式分解。 (1) x481 x^{4}-81 (2) 16a4b4 16 a^{4}-b^{4} (3) x45x2+4 x^{4}-5 x^{2}+4 (4) 4x415x2y24y4 4 x^{4}-15 x^{2} y^{2}-4 y^{4}

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Q.96

(3)\( \left(x^{2}+2 x+1\right)-a^{2} \)

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Q.97

展开 x(x-1)(x+3)(x+4)。

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Q.99

将以下公式分解成因式。(1) 2x2+7x+6 2 x^{2}+7 x+6 (2) 6x2+5x6 6 x^{2}+5 x-6

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Q.00

展开以下表达式。 (1) (3 a-b+2)(3 a-b-1) (2) (x-2 y+3 z)^{2} (3) (a+b-3 c)(a-b+3 c) (4) \left(x^{2}+2 x+2 ight)\left(x^{2}-2 x+2 ight)

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Q.01

因为你误减了式子 B=2x^2-2xy+y^2 而不是加上它,你得到了错误的答案 x^2+xy+y^2。求正确的答案。

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Q.02

将抛物线 y=x2+ax+b y=x^{2}+a x+b 关于原点对称移动,然后沿 x x 轴方向平移 3 个单位,沿 y y 轴方向平移 6 个单位,得到抛物线 y=x2+4x7 y=-x^{2}+4 x-7 。那么,a=1 a=1 多少, b=1 b=1 多少?

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Q.03

将以下表达式因式分解。 (1) x2yxy2 x^{2} y - x y^{2} (2) 6a2b9ab2+3ab 6 a^{2} b - 9 a b^{2} + 3 a b (3) \( (a + b) x - (a + b) y \) (4) \( (a - b)^{2} + c(b - a) \)

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Q.04

将以下表达式展开。 (1) \( (2 a+b)^{2}(2 a-b)^{2} \) (2) \( \left(x^{2}+9 ight)(x+3)(x-3) \) (3) \( (x-y)^{2}(x+y)^{2}\left(x^{2}+y^{2} ight)^{2} \)

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Q.05

将以下表达式分解为因式。 (1) ab+a+b+1 a b+a+b+1 (2) x2+xy+2x+y+1 x^{2}+x y+2 x+y+1 (3) 2ab23ab2a+b2 2 a b^{2}-3 a b-2 a+b-2 (4) \( x^{3}+(a-2) x^{2}-(2 a+3) x-3 a \)

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Q.06

将以下表达式因式分解。(1) 6x2+13x+6 6 x^{2}+13 x+6 (2) 3a211a+6 3 a^{2}-11 a+6 (3) 12x2+5x2 12 x^{2}+5 x-2 (4) 6x25x4 6 x^{2}-5 x-4 (5) 4x24x15 4 x^{2}-4 x-15 (6) 6a2+17ab+12b2 6 a^{2}+17 a b+12 b^{2} (7) 6x2+5xy21y2 6 x^{2}+5 x y-21 y^{2} (8) 12x28xy15y2 12 x^{2}-8 x y-15 y^{2} (9) 4x23xy27y2 4 x^{2}-3 x y-27 y^{2}

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Q.07

将以下的二次方程式进行平方完成。 (2) x2+6x2 -x^{2}+6 x-2

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Q.08

(1) 因式分解以下的二次式。 (1) x2+3xy+2y25x7y+6 x^{2}+3 xy+2 y^{2}-5 x-7 y+6 (2) 2x25xy3y2x+10y3 2 x^{2}-5 xy-3 y^{2}-x+10 y-3

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Q.09

TRAINING 8 (1) 展开以下表达式。 (1) \( (3 a+2)^{2} \) (2) \( (5 x-2 y)^{2} \) (3) \( (4 x+3)(4 x-3) \) (4) \( (-2 b-a)(a-2 b) \) (5) \( (x+6)(x+7) \) (6) \( (2 t-3)(2 t-5) \) (7) \( (4 x+1)(3 x-2) \) (8) \( (2 a+3 b)(3 a+5 b) \) (9) \( (7 x-3)(-2 x+3) \)

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Q.10

将以下表达式因式分解。 (1) 2ab3bc 2 a b - 3 b c (2) x2y3xy2 x^{2} y - 3 x y^{2} (3) 9a3b+15a2b23a2b 9 a^{3} b + 15 a^{2} b^{2} - 3 a^{2} b (4) \( a(x - 2) - (x - 2) \) (5) \( (a - b) x^{2} + (b - a) x y \)

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Q.11

将以下表达式因式分解。 (1) \( \left(x^{2}+2 x ight)^{2}-2\left(x^{2}+2 x ight)-3 \) (2) \( \left(x^{2}+x-2 ight)\left(x^{2}+x-12 ight)-144 \) (3) \( (x+1)(x+2)(x+3)(x+4)-3 \)

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Q.12

将以下表达式因式分解。 (1) x^{2}+8x+15 (2) x^{2}-13x+36 (3) x^{2}+2x-24 (4) x^{2}-4xy-12y^{2}

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Q.13

将以下方程因式分解。 [10 〜 12] 10 (1) 125a^3+64b^3 (2) 27x^4-8xy^3z^3 (3) x^3+2x^2-9x-18 (4) 8x^3-36x^2y+54xy^2-27y^3 (5) x^3+x^2+3xy-27y^3+9y^2

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Q.14

让我们回顾一下因数分解的基本! 对于包含多个变量的表达式的因数分解,先整理次数最低的变量。 方程:\[ x^{2}+3 x y+2 y^{2}-5 x-7 y+6=x^{2}+(3 y-5) x+\left(2 y^{2}-7 y+6 ight) \] 将这个方程因数分解。

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Q.15

将以下表达式分解因数。 (1) \( (x+y)^{2}-10(x+y)+25 \) (2) \( 2(x-3)^{2}+(x-3)-3 \) (3) \( \left(x^{2}+2 x+1\right)-a^{2} \) (4) 4x2y2+6y9 4 x^{2}-y^{2}+6 y-9

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Q.16

将下列式子因式分解。 (1) x^3 + 2x^2 y - x^2 z + xy^2 - 2xyz - y^2 z (2) x^3 + 3x^2 y + zx^2 + 2xy^2 + 3xyz + 2zy^2

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Q.17

将以下表达式因式分解。 (1) \( a^{2}(b+c)+b^{2}(c+a)+c^{2}(a+b)+2 a b c \) (2) \( a^{2}(b-c)+b^{2}(c-a)+c^{2}(a-b) \)

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Q.18

将以下表达式因式分解。 (1) 8x3+1 8 x^{3}+1 (2) 64a3125b3 64 a^{3}-125 b^{3} (3) 108a34b3 108 a^{3}-4 b^{3}

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Q.19

展开以下表达式。 (1) \( (2 x+1)^{2} \) (2) \( (3 x-2 y)^{2} \) (3) \( (2 x-3 y)(3 y+2 x) \) (4) \( (x-4)(x+2) \) (5) \( (4 x-7)(2 x+5) \)

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Q.20

展开(x+1)(x-2)(x+3)(x-4)。

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Q.21

(1) \( (x+y)^{2}-10(x+y)+25 \)

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Q.22

用指数法则计算单项式的积。 例 2abimes3a2b 2 a b imes 3 a^{2} b

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Q.23

展开以下表达式。 (1) \( 12 a^{2} b\left( rac{a^{2}}{3}- rac{a b}{6}- rac{b^{2}}{4} ight) \) (2) \( (3 a-4)(2 a-5) \) (3) \( \left(3 x+2 x^{2}-4 ight)\left(x^{2}-5-3 x ight) \) (4) \( \left(x^{3}-3 x^{2}-2 x+1 ight)\left(x^{2}-3 ight) \)

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Q.24

展开以下表达式。 (1) ( rac{3}{4} x^2 - xy + rac{9}{2} y^2) imes (-4xy) (2) (-2a + 3b)^2 (3) (2a - 5b)(-5b - 2a) (4) (2x + 3y)(3x - 2y) (5) (6a + 5b)(3a - 2b)

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Q.25

在展开式 8^3(7x^3+12x^2-4x-3)(x^5+3x^3+2x^2-5) 中,x^5 的系数是阿,x^3 的系数是伊。

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Q.26

将下列式子进行因式分解。 (1) x33x2+x3 x^{3}-3 x^{2}+x-3 (2) x3+6x2+12x+8 x^{3}+6 x^{2}+12 x+8

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Q.27

将以下表达式因式分解。 (1) x3+8 x^{3}+8 (2) 27x364 27 x^{3}-64 (3) 125a3+27b3 125 a^{3}+27 b^{3}

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Q.28

将下列表达式因式分解。 (1) x2+4xy+3y2+2x+4y+1 x^{2}+4 x y+3 y^{2}+2 x+4 y+1 (2) x22xy+4x+y24y+3 x^{2}-2 x y+4 x+y^{2}-4 y+3 (3) 2x2+3xy+y2+3x+y2 2 x^{2}+3 x y+y^{2}+3 x+y-2 (4) 3x2+5xy2y2x+5y2 3 x^{2}+5 x y-2 y^{2}-x+5 y-2

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Q.29

将下列方程因式分解。 (1) x2+2x+1 x^{2}+2 x+1 (2) 4x2+4xy+y2 4 x^{2}+4 x y+y^{2} (3) x210x+25 x^{2}-10 x+25 (4) 9a212ab+4b2 9 a^{2}-12 a b+4 b^{2} (5) x249 x^{2}-49 (6) 8a250 8 a^{2}-50 (7) 16x2+24xy+9y2 16 x^{2}+24 x y+9 y^{2} (8) 8ax240ax+50a 8 a x^{2}-40 a x+50 a (9) 5a320ab2 5 a^{3}-20 a b^{2}

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Q.30

展开以下表达式。 (1) (x-2y+1)(x-2y-2) (2) (a+b+c)^{2} (3) \left(x^{2}+x-1 ight)\left(x^{2}-x+1 ight)

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Q.31

将以下各式因数分解。 (1) abc+ab+bc+ca+a+b+c+1 a b c+a b+b c+c a+a+b+c+1 (2) \( (a+b)(b+c)(c+a)+a b c \) (3) \( a(b+c)^{2}+b(c+a)^{2}+c(a+b)^{2}-4 a b c \)

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Q.32

训练 15 将以下表达式因式分解。 (1). \( (x+2)^{2}-5(x+2)-14 \) (2) \( 16(x+1)^{2}-8(x+1)+1 \) (3) \( 2(x+y)^{2}-7(x+y)+6 \) (4) 4x2+4x+1y2 4 x^{2}+4 x+1-y^{2} (5) 25x2a2+8a16 25 x^{2}-a^{2}+8 a-16 (6) \( (x+y+9)^{2}-81 \)

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Q.33

展开以下表达式: (1) (3x-1)^3 (2) (3x^2-a)(9x^4+3ax^2+a^2) (3) (x-1)(x+1)(x^2+x+1)(x^2-x+1) (4) (x+2)(x+4)(x-3)(x-5) (5) (x+1)^3(x-1)^3

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Q.34

将以下表达式分解因式。 (1) x35x24x+20 x^{3}-5 x^{2}-4 x+20 (2) \( 8 a^{3}-b^{3}+3 a b(2 a-b) \) (3) 8x3+1+6x2+3x 8 x^{3}+1+6 x^{2}+3 x (4) x39x2+27x27 x^{3}-9 x^{2}+27 x-27

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Q.35

将以下方程式因式分解。 (1) x4+x2+1 x^{4} + x^{2} + 1 (2) x4+4 x^{4} + 4

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Q.36

二次方程式的基本86 因式分解法解二次方程式的方法

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Q.37

训练 19 (3) 展开以下公式。 (1) \( (x+4)^{3} \) (2) \( (3 a-2 b)^{3} \) (3) \( (-2 a+b)^{3} \) (4) \( (a+3)\left(a^{2}-3 a+9 ight) \) (5) \( (4 x-3 y)\left(16 x^{2}+12 x y+9 y^{2} ight) \) (6) \( (5 a-3 b)\left(25 a^{2}+15 a b+9 b^{2} ight) \)

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Q.38

高级学习 例题 基本例题 49 60 集合的元素确定 2个集合 A=\left\{1,3, \quad x^{2}-x-2 ight\}, \quad B=\left\{2, x+1, \quad x^{2}+x-6, x^{3}-x^{2}+x-1 ight\} 满足 AB={0,3} A \cap B=\{0,3\} , 求实数 x x 的值。并求此时的 AB A \cup B 。[山梨学院大]

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Q.39

因数分解的問題。 請將以下方程式因数分解。 1. x2+4x+3x^{2}+4x+3 2. 6ab+3ac6ab + 3ac 3. a2+2ab+b2a^{2} + 2ab + b^{2} 4. a2b2a^{2} - b^{2} 5. \(x^{2} + (a+b)x + ab\) 6. \(acx^{2} + (ad + bc)x + bd\)

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Q.40

将以下表达式因式分解。 (1) x^{2}+14 x+24 (2) a^{2}-17 a+72 (3) x^{2}+4 x y-32 y^{2} (4) x^{2}-6 x-16 (5) a^{2}+3 a b-18 b^{2} (6) x^{2}-7 x y-18 y^{2}

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Q.41

求双曲线 rac{x^{2}}{3}- rac{y^{2}}{2}=1 上的点 \( (-3,2) \) 处的切线方程。

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Updated: 2024/12/12