Answer
See below
Work Step by Step
The common ratio $r$, can be found as
$$r^2 = 12/3 = 4$$
Thus $r= 2, -2$
So the nth term,
$a_n = (2)^{n-1}*3$ or $(-2)^{n-1}*3$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 12 Sequences and Series - 12.3 Analyze Geometric Sequences and Series - 12.3 Exercises - Skill Practice - Page 815: 39
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