Answer
Not geometric
Work Step by Step
$4.75, 2.5, 0.25, -2, -4.25, -6.5, . . .$
$\frac{a_2}{a_1}=\frac{2.5}{4.75}=\frac{10}{19}=r$
$ra_2=\frac{10}{19}\times2.5=\frac{25}{19}\approx1.316\neq a_3$
and so the sequence is not geometric.
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 9 - Conic Sections, Sequences, and Series - 9.4 Geometric Sequences - 9.4 Exercises - Page 737: 18
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