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Homework Help: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary func

  1. Sep 17, 2008 #1
    1. Evaluate the commutator [d^2/dx^2, x] by applying the operators to an arbitrary function f(x).
     
    Last edited: Sep 17, 2008
  2. jcsd
  3. Sep 17, 2008 #2

    Dick

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    Re: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary

    That's (x*f(x))''-x*f'''(x), isn't it? What's the result?
     
  4. Sep 18, 2008 #3
    Re: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary

    I just found the answer it is: 2 d/dx
     
  5. Sep 18, 2008 #4

    Dick

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    Re: Evaluate the commutator [d^2x/dx^2, x] by applying the operators to an arbitrary

    I believe that's correct. Wasn't so hard, was it?
     
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