1/X+1/Y=2隐函数求导,

问题描述:

1/X+1/Y=2隐函数求导,

1/x+1/y=2
(1/x+1/y)'=2'=0
(1/x)'+(1/y)'=0
-1/x^2-1/y^2*y'=0
y'/y^2=-1/x^2
y'=-y^2/x^2