为什么d(1+e^x^2)=e^x^2dx^2
问题描述:
为什么d(1+e^x^2)=e^x^2dx^2
答
这是微分的运算规则不过你写的不完整..
应该是:d(1+e^x^2)=e^x^2d(x^2)=2xe^x^2dx.原题是。y=ln(1+e^x^2),求dy,就是顶上那一步不懂那dy=d ln(1+e^x^2)=d(1+e^x^2)/(1+e^x^2)=e^x^2d(x^2)/(1+e^x^2)=2xe^x^2dx/(1+e^x^2)注意:常数的微分=0d lnv=dv/v: d e^v=e^vdv.