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age 14
visits member for 2 years, 7 months
seen Jun 5 '13 at 0:57

Math! :)


Oct
30
reviewed Reviewed Tangent plane to sphere
Oct
30
reviewed Reviewed Proving $ \frac{1-(e^{-2})^x}{1-e^{-2}} \ge x $, for $0 \le x \le 1$.