In this link is a part of a book on approximations of functions.(adsbygoogle = window.adsbygoogle || []).push({});

http://books.google.com/books/about/An_Introduction_to_the_Approximation_of.html?id=VTW2cmjC43YC

I'd be thankful if someone would explain how the inequality near the top of page 17 was gotten.

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# Inequality from Stirling's formula

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