Hey guys!

I am supposed to show that the function f(x,y) = x^2 + y^3 is differentiable and to determine the derivate.

Do i have to show this with the differential quotient? I know about partial derivates but how to determine the "entire derivate" f'(x,y)?

I know lots of questions and no solution. Sorry for that, but please give me a clue, some keywords at least.

Thanks!

Inf