Give a combinatorial proof that 2n divides n! whenever n is an even positive integer.

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 03, 2016 01:43 AM

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Give a combinatorial proof that 2n divides n! whenever n is an even positive integer.

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Following the hint we observe that there are 2...View the full answer

Discrete Mathematics and Its Applications

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