求下列不定积分：∫[arctan√x/√x(1+x)]dxd
∫[arctan√x/√x(1+x)]dx=2∫arctan√xd(√x)/1+(√x)2=2∫(arctan√xd(arctan√x)=(arctan√x)2+c．
求下列不定积分：∫[arctan√x/√x(1+x)]dxd
∫[arctan√x/√x(1+x)]dx=2∫arctan√xd(√x)/1+(√x)2=2∫(arctan√xd(arctan√x)=(arctan√x)2+c．
