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Thread: simple but hard

  1. October 2nd 2012, 02:14 AM #1
    geniusgarvil
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    simple but hard

    Determine all integers n > 1 such that
    (2^n) + 1/n^2
    is an integer.
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  2. October 2nd 2012, 02:26 AM #2
    grillage
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    Re: simple but hard

    The way you have written it seems a little unclear. Do you mean \frac{\left ( 2^{n}+1 \right )}{n^{2}}
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  3. October 3rd 2012, 01:34 AM #3
    geniusgarvil
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    Re: simple but hard

    yes that one.
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« Limits approaching infinity | Prove that both number are rational numbers »

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