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when toggle format what by license comment
Jun 7, 2015 at 16:39 vote accept salimmath15
May 30, 2015 at 18:14 comment added salimmath15 j.Diaz , thank you for your answer but you take only k as odd integer, what about k is even ?
May 30, 2015 at 18:07 history answered Brian CC BY-SA 3.0