Difference between revisions of "2016 UNCO Math Contest II Problems/Problem 7"
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== Problem == | == Problem == | ||
| + | Evaluate | ||
| + | <cmath>S =\sum_{n=2}^{\infty} \frac{4n}{(n^2-1)^2}</cmath> | ||
== Solution == | == Solution == | ||
![\[S =\sum_{n=2}^{\infty} \frac{4n}{(n^2-1)^2}\]](http://latex.artofproblemsolving.com/5/8/f/58f783b714712db7d5b19d0f2b8d4de5d847cb83.png)
