隐函数求导xy=e^(x-y)

问题描述:

隐函数求导xy=e^(x-y)

xy=e^(x-y)
y+xy'=e^(x-y) *(1-y')
y+xy'=xy-xy*y'
(x+xy)y'=xy-y
y'=(xy-y)/(x+xy)