Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 14 - Sequences, Series, and the Binomial Theorem - 14.1 Sequences and Series - 14.1 Exercise Set - Page 894: 9

Answer

d)

Work Step by Step

If we want to write the expression in another form: $5+10+15+20=5(1)+5(2)+5(3)+5(4)=\sum_{k=1}^45k$ The answer is d)
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