Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 14 - Sequences, Series, and the Binomial Theorem - 14.4 The Binomial Theorem - 14.4 Exercise Set: 69

Answer

$\frac{n!}{(n-r)!(n-(n-r))!}=\frac{n!}{(n-r)!r!}$

Work Step by Step

The binomial coefficient of $\binom{n}{r}=\frac{n!}{r!(n-r)!}$ Which equals to $\binom{n}{n-r}=\frac{n!}{(n-r)!(n-(n-r))!}=\frac{n!}{(n-r)!r!}$
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