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Small integration

  1. May 24, 2008 #1
    Hello.I actually didn't know exactly how do we get to the second line with this integration.
     

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  2. jcsd
  3. May 24, 2008 #2

    Defennder

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    Integrate this by splitting up the interval on which it is done:

    [tex]\int^L_{-L} f(t) dt = \int^L_{0} f(t) dt + \int^0_{-L} f(-t) dt [/tex]

    Then you'll be able to remove the '| |' and integrate it normally. When you're done with the integration, just substitute in the limits and let L approach infinity.
     
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