# Formula:KLS:01.11:04

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$\displaystyle {\displaystyle \index{q-Vandermonde summation formula@q-Vandermonde summation formula}\index{Summation formula!q-Vandermonde@q-Vandermonde}\index{q-Chu-Vandermonde summation formula@q-Chu-Vandermonde summation formula}\index{Summation formula!q-Chu-Vandermonde@q-Chu-Vandermonde} \qHyperrphis{2}{1}@@{q^{-n},b}{c}{q}{\frac{cq^n}{b}}=\frac{\qPochhammer{b^{-1}c}{q}{n}}{\qPochhammer{c}{q}{n}} }$

## Constraint(s)

$\displaystyle {\displaystyle n=0,1,2,\ldots}$

## Proof

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## Symbols List

$\displaystyle {\displaystyle {{}_{r}\phi_{s}}}$  : basic hypergeometric (or $\displaystyle {\displaystyle q}$ -hypergeometric) function : http://dlmf.nist.gov/17.4#E1
$\displaystyle {\displaystyle (a;q)_n}$  : $\displaystyle {\displaystyle q}$ -Pochhammer symbol : http://dlmf.nist.gov/5.18#i http://dlmf.nist.gov/17.2#SS1.p1