已知xy-e^x+e^y=0,求dy/dx
问题描述:
已知xy-e^x+e^y=0,求dy/dx
答
对xy-e^x+e^y=0 求微分得
ydx+xdy-e^xdx+e^ydy=0
(y-e^x)dx+(x+e^y)dy=0
dy/dx=(x+e^y)/(e^x-y)