Answer
-37916508.16
Work Step by Step
If we want to find the 23rd term, we have to substitute $n$ by 23:
$a_{23}=(-2)^{23-2}(45.68-1.2(23))=(-2)^{21}(45.68-27.6)=-2097152(18.08)=-37916508.16$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 14 - Sequences, Series, and the Binomial Theorem - 14.1 Sequences and Series - 14.1 Exercise Set - Page 894: 18
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