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Thread: Come solve this if u think you are smart=)

  1. February 21st 2008, 03:07 AM #1
    hotgal24
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    Come solve this if u think you are smart=)

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  2. February 21st 2008, 03:23 AM #2
    Plato
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    Here is a hint to help you.
    \frac{1}{{\sqrt k + \sqrt {k + 1} }} = \left( {\frac{1}{{\sqrt k + \sqrt {k + 1} }}} \right)\frac{{\sqrt k - \sqrt {k + 1} }}{{\sqrt k - \sqrt {k + 1} }} = \sqrt {k + 1} - \sqrt k
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