Intermediate Algebra: Connecting Concepts through Application

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: 17

Answer

Not geometric

Work Step by Step

$-4.5, 0, 4.5, 9, 13.5, 18, . . . $ Observe that $\frac{a_3}{a_2}=\frac{4.5}{0}$, which is undefined and so the sequence cannot be geometric.
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