Answer
See below.
Work Step by Step
$i$ is the index of summation. $i=1$ is the lower limit of the summation and i=n (written as $n$ in the notation) is the upper limit by convention.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 11 - 11.1 - Sequences and Series - 11.1 Exercises - Page 777: 5
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