求d/dx∫(arctanx,0)tantdt,(arctanx,0)为积分范围

问题描述:

求d/dx∫(arctanx,0)tantdt,(arctanx,0)为积分范围

d/dx∫(arctanx,0)tantdt
=tan(arctanx)*(1/(1+x²))
=x/(1+x²)