Hi all, I've to recover a function ∅ such that F=∇∅,F=3x^2y i +(x^3+2yz)j+y^2k. So, ∂∅/∂x=3x^2y, Integrating w.r.t. x ∅=x^3y+f(y,z) ,Assuming there may be function of y and z.----------1 ∴∂∅/∂y=x^3+f'(y,z) now, ∂∅/∂y=(x^3+2yz)=x^3+f'(y,z) ∴f'(y,z)=2yz To find ∅ from 1 I've to find f(y,z). My problem is how to get f(y,z) from f'(y,z),should I integrate it w.r.t. y or z? Thanks for your help.