Answer
See the explanation below.
Work Step by Step
Summation symbol $\sum$ means we will have to add all the numbers form starting number to ending number.
Let us take an example $\sum_{k=1}^2(k)=1+2=3$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Section 11.1 - Sequences and Summation Notation - Exercise Set - Page 830: 65
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