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: 6

Answer

Not geometric

Work Step by Step

$-7.75, -1.5, 4.75, 11, 17.25, 23.5, . . .$ $\frac{a_2}{a_1}=\frac{-1.5}{7.75}=0.1935...=r$ $ra_2=-0.2903...\neq a_3$ So the sequence is not geometric.
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