Answer
-23.5
Work Step by Step
If we want to find the 12th term, we have to substitute $n$ by 12:
$a_{12}=(-1)^{12-1}(3.4(12)-17.3)=(-1)^{11}(40.8-17.3)=(-1)23.5=-23.5$
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: 17
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