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Dirac delta function evaluation

  1. Nov 9, 2009 #1
    I do not know how to execute the problem with the 2x in the problem.

    Evaluate the integral:

    [tex]

    \int_{-4}^{4} (x^2+2x+1) \delta(2x) dx

    [/tex]
     
  2. jcsd
  3. Nov 9, 2009 #2
    Simplest way would be to change variables. Write 2x = y, and you know what integral over [tex] \delta(y) [/tex] gives right?
     
  4. Nov 9, 2009 #3
    Yup i got it. Thanks.
     
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