Answer
$-4$
Work Step by Step
From the graph we get
$a_{1}=-4;a_{2}=-1;a_{3}=2;a_{4}=5;a_{5}=8$
$\Rightarrow a_{1}=-4$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 11 - Further Topics in Algebra - 11.2 Arithmetic Sequences and Series - 11.2 Exercises - Page 1024: 6
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