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Dec 17, 2013 at 14:10 comment added swdev I know I am not good in math, and this page clearly proof it! Great!
Jun 14, 2012 at 5:24 vote accept Veyha
Jun 14, 2012 at 3:49 history edited Daniel Carlsson CC BY-SA 3.0
Explained how the formula was derived
Jun 14, 2012 at 3:00 history answered Daniel Carlsson CC BY-SA 3.0