On Thu, Aug 21, 2008 at 1:29 AM, Alec Mihailovs <[EMAIL PROTECTED]> wrote:
>
> Both Maple and Mathematica give wrong answers to the following sum,
>
> Sum[Binomial[n, k]/Binomial[2 n, k]/k! (2 x)^k, {k, 0, n}]
>
> I tried to find a way to calculate it in SAGE, but couldn't find symbolic
> sums in the documentation. Is Maxima supposed to be used directly?
>

Nobody wrote a wrapper for symbolic sums in Sage so you have to
use maxima directly for that.

William

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