Discrete Mathematics with Applications 4th Edition

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: 62

Answer

$4$

Work Step by Step

$\frac{4!}{3!}=\frac{4\times3\times2\times1}{3\times2\times1}=4$
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