求函数y=(1 x^2)arctan x的yN阶导

Question

求函数y=(1 x^2)arctan x的yN阶导

Answer 1

y'=2xarctanx+(1+x^2)/(1+x^2)=2xarctanx+1y''=2arctanx+2x/(1+x^2)dy=[2xarctanx+(1+x^2)/(1+x^2)]dx本回答被网友采纳