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anon earned this badge 3 times
jun 8 '12 at 17:10
Cute Determinant Question
jan 30 '12 at 23:56
Pythagorean Theorem Proof Without Words (request for words)
jan 30 '12 at 0:17
A pencil approach to find $\sum \limits_{i=1}^{69} \sqrt{\left( 1+\frac{1}{i^2}+\frac{1}{(i+1)^2}\right)}$

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