求函数y=x/1-x^2的微分(带步骤)
问题描述:
求函数y=x/1-x^2的微分(带步骤)
答
y=x/(1-x^2)
y'=[(x)'(1-x^2)-x*(1-x^2)']/(1-x^2)^2
=[(1-x^2)-x*(-2x)]/(1-x^2)^2
=(1+x^2)/(1-x^2)^2
故
dy
=y'dx
=(1+x^2)/(1-x^2)^2dx