百度试题 结果1 题目 The coefficient of the x3 term in the expansion of (x + a)4 is 256Work out the value of a 相关知识点: 试题来源: 解析 a=64 反馈 收藏
解析 (a+x)^{5}+(1-2x)^{6}Coeff of x^{3} in 1^{st}=10\times a^{2}Coeff of x^{3} in 2^{nd}=20\times(-2)^{3}\rightarrow 10a^{2}-160=90\rightarrow a=5cocoForming an equation for a + solutionco ( condone ±) ...
Part 21. Find the coefficient of x3 in the expansion of(x^2-2x+6)(x^3+3x^2-5x+7) .求在 (x^2-2x+6)(x^3+3x^2-5x+7) 的展開式中x3的數。 A.1 B.3 C.-5 D.-2 E. 7 相关知识点: 试题来源: 解析 答案c 解析 (x2-2x+6)(x3+3x2-5x+7) 含x2的项为x2(-5x),(...
百度试题 结果1 题目11. Find the coefficient of x3 and of x in the expansion of(a) (1-3x)^8 , (b) (1+2x)^(12) , so (1-(x^2)/4)^(10) 相关知识点: 试题来源: 解析 (a) -1512,20412 (b) 1760,59136(c) 反馈 收藏
If f(x) is a linear function, which statement must be true: A) f(x) has no constant term. B) f(x) has no x^2 term. C) f(x) has no terms with a coefficient other than 1. D) f(x) has no x-term. Determine the numeric c...
1 The coefficient of x3 in t eexpansionof(a+x)^5+(1-2x)^6 , where a is positive, is 90. Find the value of a.[5] 相关知识点: 试题来源: 解析 (a+x)^{5}+(1-2x)^{6}Coeff ofx^{3}in1^{st}=10\times a^{2}Coeff ofx^{3}in2^{nd}=20\times(-2)^{3}\rightarrow 1...