Answer
$(c)$
Work Step by Step
If $a_n=-2n+7$, then
$a_1=-2\cdot1+7\\
a_1=-2+7=\\
a_1=5.$
Hence, the answer is $(c)$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 12 - Sequences; Induction; the Binomial Theorem - 12.2 Arithmetic Sequences - 12.2 Assess Your Understanding - Page 814: 6
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