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来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 08:04:26

解题思路： go for the holiday 去度假 what's the matter with...... 怎么了?
解题过程：
1. did for holiday 2. was matter lost
最终答案：1. did for holiday 2. was matter lost

求∫xf''(x)dx ∫xf'(x)dx=? [f(x)+xf'(x)]dx 求积分∫xf''(x)dx ∫(0,3) xf(x-1)dx 对∫xf(x)dx求导=? ∫xf(x)dx = F(x),则F'(x) = xf(x) 为什么 F'(x) = xf(x)?是一个定理吗? 不定积分xf（x^2)f'(x^2)dx=多少 ∫xf(x^2)f'(x^2)dx=? [f(x)+xf'(x)]dx 求不定积分,详解, 求不定积分 ∫ [f(x)+xf'(x)]dx= XF,You were the only person in my eyes.