Answer
$n\times(n-1)$
Work Step by Step
$\frac{n!}{(n-2)!}=\frac{n\times(n-1)\times(n-2)!}{(n-2)!}=n\times(n-1)$
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 243: 67
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