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Thread: Solve in integers

  1. October 2nd 2011, 04:31 AM #1
    atreyyu
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    Solve in integers

    Find all pairs of positive integers (a,b) such that 2^a+5^b is a perfect square.

    No idea how to tackle that one...
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  2. October 2nd 2011, 08:20 AM #2
    alexmahone
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    Re: Solve in integers

    See this.
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