Can Any one help me in solving the following summation: Sum (1 to Inf) [ n / (2^n)] ?
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Originally Posted by Amjad Can Any one help me in solving the following summation: Sum (1 to Inf) [ n / (2^n)] ? Do you need a proof? Or is this ok?
Thank you very much ... can you post a brief proof?
Originally Posted by Amjad Thank you very much ... can you post a brief proof? Just consider that for every interior point of a series interval of convergence it is uniformly convergent. So the derivative of the series is the derivative of the inside of the series i.e.
Thanks alot...this was very helpful...
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