Answer
$a_{n}=-0.5-0.2n$
$a_{10}=-2.5$
Work Step by Step
The nth term of an arithmetic sequence is
$a_{n}=a+(n-1)d$
----------------
$a_{n}=-0.7-0.2(n-1)$
$a_{n}=-0.7-0.2n+0.2$
$a_{n}=-0.5-0.2n$
$a_{10}=-0.5-0.2(10)=-0.5-2=-2.5$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 12 - Section 12.2 - Arithmetic Sequences - 12.2 Exercises - Page 857: 13
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