Negative Binomial Series

Negative Binomial Series

Warning

This post is more than a year old. Information may be outdated.
∑j=0∞(j+k−1k−1)aj=(1−a)−k if ∣a∣<1\sum\limits_{j=0}^{\infty} {{j+k-1} \choose {k-1}} a^j = (1-a)^{-k} ~\text{if}~ |a| < 1
Backlinks1