Abel's Identity

Posts: 1100
Joined: Apr 11, 2005

by luimichael, Apr 1, 2017, 12:54 PM

The Abel's identity:
$x^{-1}(x+y+n)^n=\sum_{k=0}^n C_k^n(x+k)^{k-1}(y+n-k)^{n-k}$

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