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Homework Help: Improper Integrals

  1. Apr 12, 2009 #1
    [\The question is to evaluate the integral from 1 to infinity of ∫[(1)/(3x+1)^2] dx.

    No idea how to do this can anyone help explain improper integrals please.

    THE ANSWER TO THE PROBLEM IS 1/12 thought . . . .

  2. jcsd
  3. Apr 12, 2009 #2
    You need to find the anti-derivative and then evaluate it the anti derivative like normal, just take the limit as the upper limit of integration goes to infinity.
  4. Apr 12, 2009 #3


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    To find that antiderivative, just substitute ' 3x +1 = p ' and then express the whole deal in terms of ' p ' .
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