Answer
$\{s_n\}=(-1)^{n+1}.$
Work Step by Step
By looking at the pattern: $\{s_n\}=(-1)^{n+1}.$
Because the sequence begins at $-1$ and the alternates the sign at each new term.
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 - 12.1 Sequences - 12.1 Assess Your Understanding - Page 807: 31
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