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: 21

Answer

$n$

Work Step by Step

$\binom{n}{n-1} =\dfrac {n!}{\left( n-1\right) !\left( n-\left( n-1\right) \right) !}=\dfrac {n!}{\left( n-1\right) !\times 1!}=\dfrac {n!}{\left( n-1\right) !}=n$
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