Answer
$17.$
Work Step by Step
In an arithmetic sequence if we know a term is $a_n$, we know that the common difference is $d$, then $a_{n+1}=a_n+d$.
Hence here: $a_6=a_5+d=12+5=17.$
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: 3
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