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Homework Help: Vector Identity proof

  1. Dec 8, 2005 #1
    Hello, I need some help on this vector identity. Im supposed to prove that Del Dot (Del(g(r)))=(2/r){dg(r)/dr}+(d^2g(r)/dr^2). Using Cartesian Coordinates. Any help would be GREATLY appreciated> :)
     
  2. jcsd
  3. Dec 8, 2005 #2

    robphy

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    How is r related to your Cartesian coordinates?
    Do you know the chain rule?
     
  4. Dec 8, 2005 #3
    r^2=x^2+.....?


    I think thats what I have to do! I was using r=x*x_hat+.... Ill try that, thanks!
     
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