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Thread: How to find integral of following equation?

  1. #1
    Junior Member
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    How to find integral of following equation?

    I am badly stuck in some integration here and will appreciate any help out of it.


    $$\int^\infty_0f(r) dr = \int^\infty_0 \frac{Ar}{1+Cr^\alpha} e^{-Br^2} dr$$


    If I let $u = Br^2$, then I get


    $$ = \frac{A}{2B} \int^\infty_0\frac{\exp(-u)}{1+(u/B)^{2/\alpha}} du$$


    But I am stuck while proceeding further. Any idea?
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  2. #2
    MHF Contributor
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    Re: How to find integral of following equation?

    Hey sjaffry.

    Hint - Try doing integration by parts.
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