[考研类试卷]考研数学数学二模拟试卷252及答案与解析.doc

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1、考研数学数学二模拟试卷 252 及答案与解析一、选择题下列每题给出的四个选项中,只有一个选项符合题目要求。1 2 设 F(x)是 f(x)在区间(a,b)内的一个原函数,则 F(x)f(x)在区间(a,b)内( )(A)可导(B)连续(C)存在原函数(D)是初等函数3 4 5 函数 yC 1exC 2e2xxe x 满足的一个微分方程是( ) (A)y一 y2y3xe x(B) yy2y3e x(C) yy2y3xe x(D)yy2y3e x6 (A)有且仅有水平渐近线(B)有且仅有铅直渐近线(C)既有水平渐近线,也有铅直渐近线(D)既无水平渐近线,也无铅直渐近线7 8 二、填空题9 设 A,

2、B,C 均为 n 阶矩阵, E 为 n 阶单位矩阵,若 B=E+AB,C=A+CA,则 B-C 为_.10 11 12 13 14 三、解答题解答应写出文字说明、证明过程或演算步骤。15 16 17 18 19 20 21 22 求 y=2x 的麦克劳林公式中 xn 项的系数.23 已知边长 x6m 与 y8m 的矩形,求当 z 边增加 5cm,y 边减少 10cm 时,此矩形对角线变化的近似值考研数学数学二模拟试卷 252 答案与解析一、选择题下列每题给出的四个选项中,只有一个选项符合题目要求。1 【正确答案】 B【试题解析】 2 【正确答案】 C3 【正确答案】 D【试题解析】 4 【正确

3、答案】 A【试题解析】 5 【正确答案】 D6 【正确答案】 A7 【正确答案】 A【知识模块】 一元函数微分学8 【正确答案】 A【试题解析】 二、填空题9 【正确答案】 E【知识模块】 矩阵10 【正确答案】 【试题解析】 11 【正确答案】 0【试题解析】 12 【正确答案】 1【试题解析】 13 【正确答案】 【试题解析】 14 【正确答案】 【试题解析】 三、解答题解答应写出文字说明、证明过程或演算步骤。15 【正确答案】 16 【正确答案】 17 【正确答案】 18 【正确答案】 19 【正确答案】 20 【正确答案】 21 【正确答案】 22 【正确答案】 【知识模块】 一元函数微分学23 【正确答案】

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