can someone please explain how to get the result WolframAlpha gets at the following link:(adsbygoogle = window.adsbygoogle || []).push({});

http://www.wolframalpha.com/input/?i=sum+(2n+1)/(n+(n+1)+(n+2))

the sum is (2n+1)/(n (n+1) (n+2)) from n=1 to inf. and the result is 5/4 .

Thanks.

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# A Simple Convergent Series

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