Timeline for How to calculate the sum of general type $\sum_{k=0}^n {n\choose k} {n\choose k+a} {2 k- n + a \choose r }$?
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Aug 11, 2022 at 21:09 | comment | added | Sergii Voloshyn | Thank you for the answer. | |
| Aug 9, 2022 at 17:01 | history | edited | Max Alekseyev | CC BY-SA 4.0 |
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| Aug 9, 2022 at 16:56 | history | edited | Max Alekseyev | CC BY-SA 4.0 |
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| Aug 9, 2022 at 16:48 | comment | added | Max Alekseyev | @esg: Good catch! Corrected now. | |
| Aug 9, 2022 at 16:47 | history | edited | Max Alekseyev | CC BY-SA 4.0 |
corrected
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| Aug 9, 2022 at 16:07 | comment | added | esg | Shouldn't it be $(1+y)^2 +\frac{z^2}{1+z}$ in the first bracket? (You don't get $0$ for $r=1$) | |
| Aug 7, 2022 at 14:29 | history | edited | Max Alekseyev | CC BY-SA 4.0 |
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| Aug 7, 2022 at 14:23 | history | answered | Max Alekseyev | CC BY-SA 4.0 |