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Math Help - Double series

  1. #1
    Math Engineering Student
    Krizalid's Avatar
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    Double series

    May be you want to give it a try to this nice problem.

    Evaluate \sum\limits_{m = 1}^\infty  {\sum\limits_{n = 1}^\infty  {\frac{1}<br />
{{m^2 n + mn^2  + 2mn}}} } .

    Cheers
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    Any takers? (It's not hard )
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  3. #3
    Super Member General's Avatar
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    Sorry. It is old thread, But really I want to know how to solve this.
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