College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 8, Sequences and Series - Section 8.1 - Sequences and Summation Notation - 8.1 Exercises: 51

Answer

8

Work Step by Step

We evaluate the sum: $\sum_{i=1}^{8}[1+(-1)^{i}]=[1-1]+[1+1]+[1-1]+[1+1]+[1-1]+[1+1]+[1-1]+[1+1]=0+2+0+2+0+2+0+2=8$
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