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Homework Help: Vector calculus. Divergent vector field.

  1. Apr 20, 2008 #1
    webassign.jpg


    I don't even know where to start this one. I can do all the other problems in the section, but this one makes no sense
     
    Last edited: Apr 20, 2008
  2. jcsd
  3. Apr 20, 2008 #2
    a). since you've done the other problems, you surely saw some gradients and divergences. The easiest way to do this is piece by piece. First take the gradient of f to get a vector field. Then simply apply div to this vector field to get the answer.

    once you get this you will see the answer for part b
     
  4. Apr 20, 2008 #3
    um just do what it says? what part are you having trouble with?
     
  5. Apr 21, 2008 #4

    HallsofIvy

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    I agree with ice109- if the problem asks you to find "div grad f", I would recommend that you first find the grad of f and then the div of that! I am assuming that, since you were given a problem like this, you know what "div" and "grad" are.
     
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