# calculus

posted by
**maggie**
.

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y

and show that the mixed partial derivatives fxy and fyx are equal

posted by
**maggie**
.

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y

and show that the mixed partial derivatives fxy and fyx are equal