[SOLVED] Partial Derivatives I'm having a bit of trouble on an old test problem. It states: Determine if there is a function f(x, y) such that fx(x, y) = yex + 1 and fy(x, y) = ex + cos(y). If such a function exists, find it. I know that such a function exists because fxy(x, y) = ex, and fyx(x, y) = ex, thus fxy = fyx. I'm having trouble finding the original function. I know that I would probably have to integrate somehow, but I'm not sure how to go about that with partial derivatives. Any help is appreciated.