用復(fù)合函數(shù)求導(dǎo),首先把a(bǔ)rctan√x看成一個整體
dy=In（arctan√x）*2^arctan√x *d（arctan√x ）再把√x看成一個整體
=In（arctan√x）*2^arctan√x *1/（1+x）*d √x
=In（arctan√x）*2^arctan√x *1/（1+x）* 1/2√x dx