Task 946 (Q695690)
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scientific article; zbMATH DE number 6115907
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Task 946 |
scientific article; zbMATH DE number 6115907 |
Statements
Task 946 (English)
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16 December 2012
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Gives the closed form solution \[ \sum_{k=0}^{n-1}(-1)^k {{n-1}\choose{k}}\frac{1}{2^k(n+k+1)}=2^n\frac{(n-1)!n!}{(2n)!}\frac{1}{n2^n}. \]
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