Chapter 16.5, Problem 34E

To determine

To prove:

Greens second identity:

$\underset{ D}{\overset{}{\iint }}(f{\nabla }^{2}gdA-g{\nabla }^{2}f)dA={\oint }_C^{\square }(f\nabla g-g\nabla f)·nds$

Where $D$ and $C$ satisfy the hypotheses of Green’s Theorem