Answer
$1727$
Work Step by Step
We need to use the formula $ a_n =a_1+(n-1) d $
Here, $ a_1=5$ and $ d=7$
$ a_{22}=5 +(22-1) \times (7) =152$
or, $ a_{22}=152$
Now, $ S_{22}=\dfrac{22(5+152)}{2}=1727$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 10 - Review Exercises - Page 1124: 22
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