Answer
$168$
Work Step by Step
The expression $
\displaystyle\sum_{i=1}^7(i+i^2)
$ evaluates to
\begin{array}{l}
(1+1^2)+(2+2^2)+(3+3^2)+(4+4^2)+(5+5^2)+(6+6^2)+(7+7^2)
\\=
2+6+12+20+30+42+56
\\=
168
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Section 11.3 - Series - Exercise Set - Page 652: 59a
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