Formula q_468 (Q324): Difference between revisions

Latest revision as of 13:06, 20 April 2020

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Language	Label	Description	Also known as
English	Formula q_468	No description defined

q_468

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\displaystyle \sum _{r=0}^{n}{n+r \choose r}{\frac {1}{2^{r}}}=2^{n}

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@@ Property / arqmath formula id @@
+q_468
@@ Property / arqmath formula id: q_468 / rank @@
+Normal rank
@@ Property / Defining formula @@
+ $\displaystyle \sum _{r=0}^{n}{n+r \choose r}{\frac {1}{2^{r}}}=2^{n}$ 
\displaystyle \sum_{r=0}^n {n+r\choose r} \frac{1}{2^{r}}= 2^{n}
+Normal rank