Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 10 - Section 10.1 - Sequences and Summation Notation - Exercise Set - Page 1050: 95


It makes sense.

Work Step by Step

The given expression $\sum\limits_{i=1}^{8}{(i+7)}$ shows $(i+7)$ is the single term, whereas the expression $\sum\limits_{i=1}^{8}{i+7}$ indicates that $ i $ is the single term and $7$ is the addition to the whole sequence. Hence $\sum\limits_{i=1}^{8}{(i+7)}=92$ Whereas $\sum\limits_{i=1}^{8}{i+7}=43$
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