Answer
$a_1=5$
$a_2=10$
$a_3=20$
$a_4=40$
$a_5=80$
Work Step by Step
If $a_n=2a_{n-1}$ and $a_1=5$, then
$a_2=2a_1=2(5)=10$
$a_3=2a_2=2(10)=20$
$a_4=2a_3=2(20)=40$
$a_5=2a_4=2(40)=80$
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: 39
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