Find the sum of the series(adsbygoogle = window.adsbygoogle || []).push({});

E (-1)^(n-1) * (n/(2^{n-1}))

By using the power series 1/ (1+x) = E (-1)^n *x^n,

I am unsure of what to do...

Do I take the derivative with respect to x of both sides?

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# Homework Help: Find the Sum:

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