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April 18, 2015

April 18, 2015

Posted by **justme** on Wednesday, October 26, 2011 at 9:20pm.

- math -
**Steve**, Thursday, October 27, 2011 at 12:15am(x + 1/x)(x + 1/x)

The "trick" is seeing that x * 1/x = 1

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