Answer
$-92$
Work Step by Step
We need to use the formula $ a_n =a_1+(n-1) d $
Here, $ a_1=3$ and $ d=-5$
Plug $ n=20$
$ a_{20}=3 +(20-1) \times (-5) $
or, $=3-95$
or, $ a_{20}=-92$
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: 21
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