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| − | Here is a [http://www.math.purdue.edu/~bell/MA181/challenge.pdf | + | Here is a [http://www.math.purdue.edu/~bell/MA181/challenge.pdf Challenge Problem] about the sum that converges to |
<math>\frac{\pi}{4}</math>. | <math>\frac{\pi}{4}</math>. | ||
Revision as of 09:31, 14 October 2008
Here is a Challenge Problem about the sum that converges to $ \frac{\pi}{4} $.
