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Math Help - series

  1. #1
    Newbie
    Joined
    Aug 2008
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    series

    Hi all,

    Discuss cnvergence:

     <br />
\sum\limits_{n = 3}^\infty {(\frac{{2^n + n}}{{3^n - n}}} )<br /> <br />
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
    Joined
    Mar 2007
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    Santiago, Chile
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    14
    the following inequality holds for n\ge1:

    \frac{2^{n}+n}{3^{n}-n}<\frac{2^{n+2}}{3^{n}}.

    now it's just a simple a direct comparison test with the geometric series.
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  3. #3
    Newbie
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    Thank you very much
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