Answer
$105$
Work Step by Step
Since, we have
$\sum_{i=1}^{6}(5i)=5(1)+5(2)+5(3)+5(4)+5(5)+5(6)$
or, $=5+10+15+20+25+30$
Hence, we get
$=105$
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 829: 17
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