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Homework Help: Improper integral

  1. Jul 11, 2006 #1
    Hi, for some reason I cant remember and ive been looking everywhere for some info but cant find anything. Im trying to find out the answer to :

    [tex] \int_1^i^n^f^i^n^i^t^e \frac{1}{(3x+1)^2}dx[/tex]

    what is the integral of [tex] \int \frac{dx}{(ax+b)^2}[/tex]?

    Thanks
     
  2. jcsd
  3. Jul 11, 2006 #2

    StatusX

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    Try the substitution u=ax+b.
     
  4. Jul 11, 2006 #3
    ahhh, got it, THanks
     
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