- #1
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I have
[tex]
\sum^{\infty}_{n=1}\frac{(-1)^{n+1}}{n^{2}}
[/tex]
I need to show it equals pi^2 / 12. Not sure where to begin :\ Tried plugging in values but non cancel out which I can see :\
[tex]
\sum^{\infty}_{n=1}\frac{(-1)^{n+1}}{n^{2}}
[/tex]
I need to show it equals pi^2 / 12. Not sure where to begin :\ Tried plugging in values but non cancel out which I can see :\