S(arctan√x)/(√x(1+x))dx

问题描述:

S(arctan√x)/(√x(1+x))dx

S(arctan√x)/(√x(1+x))dx
=2S(arctan√x)/(1+x) d√x
=2S(arctan√x)darctan√x
=(arctan√x)^2 + C