Question

数学不定积分的求解………………希望能得到具体点的答案,坐等最佳答案,谢谢大家帮忙.不急不急哦

Answer 1

1. 原式=∫(1/x-x/(1+x²))dx

=ln|x|-1/2ln(1+x²)+c

2. dz/dx=az/au du/dx+az/av dv/dx

=(2uv+3v^4)e^x+(u²+12uv³)cosx

=(2e^xsinx+3sin^4 x)e^x+(e^2x+12e^xsin³x)cosx