设y=3x+1,则其反函数x=x(y)的导数x'(y)=
问题描述:
设y=3x+1,则其反函数x=x(y)的导数x'(y)=
答
x=(y-1)/3=y/3-1/3
x'(y)=1/3
设y=3x+1,则其反函数x=x(y)的导数x'(y)=
x=(y-1)/3=y/3-1/3
x'(y)=1/3