Come solve this if u think you are smart=)

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February 21st 2008, 03:07 AM
hotgal24

Come solve this if u think you are smart=)

http://img153.imageshack.us/img153/7748/lmaose3.jpg
February 21st 2008, 03:23 AM
Plato

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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