设Z=f(x,y)且f(x,x^2)=x^3+1,fx(x,x^2)=x^2-2x^3,则求fy(x,x^2)=?

问题描述:

设Z=f(x,y)且f(x,x^2)=x^3+1,fx(x,x^2)=x^2-2x^3,则求fy(x,x^2)=?