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: 51

Answer

$\Sigma^{n-1}_{i=0}(n-1)$

Work Step by Step

Writing the given expression in summation notation thus $n+(n-1)+(n-2)+...+1=\Sigma^{n-1}_{i=0}(n-1)$
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