How to Prove These Vector Integration Problems?

[zhaene]

(a) Prove that \begin{array}{clcr}\int\int_{S} r^{5}ndS=\int\int\int_{V}5r^{3}rdV

(b) Prove that \begin{array}{clcr}\oint_{c}\phi{d}r=\begin{array}{clcr}\int\int_{S}dS\times\nabla\phi

 

[noblegas]

(a) Prove that \begin{array}{clcr}\int\int_{S} r^{5}ndS=\int\int\int_{V}5r^{3}rdV

(b) Prove that \begin{array}{clcr}\oint_{c}\phi{d}r=\begin{array}{clcr}\int\int_{S}dS\times\nabla\phi

Did you actually work out this problem yet?