Answer
$n$
Work Step by Step
$=\frac{n!}{(n-1)!(n-n+1)!}$
$=\frac{n!}{(n-1)!}$
$=\frac{(n-1)!n}{(n-1)!}$
$=n$
Discrete Mathematics with Applications 4th Edition
by Epp, Susanna S.
Published by
Cengage Learning
ISBN 10:
0-49539-132-8
ISBN 13:
978-0-49539-132-6
Chapter 5 - Sequences, Mathematical Induction, and Recursion - Exercise Set 5.1 - Page 244: 75
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