1/(1-X)的导数要过程

Question

如题所述

Answer 1

利用y=u/v。y'=(u'v-uv')/v²
[1/(1-X)]'
=-(1-x)'/(1-x)²
=1/(1-x)²本回答被提问者采纳

Answer 2

复合函数求导
设u(x)=1-x
f[u(x)]=1/u(x) f'[u(x)]=ln(1-x)×(1-x)'=-ln(1-x)