1. Nov 24, 2011 #1

   craig16

   

   1. The problem statement, all variables and given/known data
   
   Let r = x i + y j + z k and R = |r|. Let F = r/R^p.
   
   find div(F) in terms of r.. i can't figure out how to express it in therms of r
   
   2. Relevant equations
   
   div(F) = the gradient added together

    

   craig16, Nov 24, 2011
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3. Nov 24, 2011 #2

   susskind_leon

   

   First: express F in terms of x,y,z
   Second: Compute the divergence of F by hand
   Third: try to identify r in div F

    

   susskind_leon, Nov 24, 2011
4. Nov 24, 2011 #3

   craig16

   

   hahaha sweet.. i figured it out. I was thinkin it was just too complicated but when you replace all the stuff with r it works out nicely.
   
   thanks!

    

   craig16, Nov 24, 2011

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