calc 3 easy question!! I am trying to find the partial derivative of the following function with respect to y. I know how to find it without using the definition...but i want to know how to do it both ways. any help?? g(x,y)=x^2*e^-y I got: lim as h approaches h [(x^2*e^-(y+h))-x^2*e^-y]/h....simplifying it is the hard part. ...any step by step help would be greatly appreciated.