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Formula q_468 - ArqMath20

Formula q_468 (Q324)

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

Statements

arqmath formula id

q_468

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Defining formula

\sum_{r = 0}^{n} (\binom{n + r}{r}) \frac{1}{2^{r}} = 2^{n}

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