Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 11 - Further Topics in Algebra - 11.4 The Binomial Theorem - 11.4 Exercises - Page 1045: 24



Work Step by Step

$9$C$7$ is equivalent with following expression: $\binom{9}{7} =\frac{9!}{7!\times (9-7)!}=\frac{7!\times8\times9}{7!\times2!}=\frac{8\times9}{2\times1}=36$
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