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Homework Help: Short improper integral question (how to rewrite?)

  1. Mar 22, 2010 #1
    1. The problem statement, all variables and given/known data
    f0uvk4.jpg


    2. Relevant equations
    b8papu.jpg


    3. The attempt at a solution
    33wtm6r.jpg

    I'm trying to rewrite the integral as shown

    Most probably a real simple answer

    Thank you
     
  2. jcsd
  3. Mar 22, 2010 #2

    CompuChip

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    In the first integral, try substituting x for -x.
     
  4. Mar 22, 2010 #3
    I don't understand, wouldn't that be illegal to do?
     
  5. Mar 22, 2010 #4

    Dick

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    Yes, it would. But Compuchip meant to do a u-substitution. u=(-x), du=(-dx).
     
  6. Mar 22, 2010 #5

    CompuChip

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    Exactly. And don't forget the integration boundaries as well.
     
  7. Mar 22, 2010 #6
    I have it now. Thank you
     
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