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 - 9.3 Arithmetic Sequences - 9.3 Exercises: 23

Answer

$n=162$

Work Step by Step

$a_n=50+\sqrt{2n}$ when $a_n=68$ $50+\sqrt{2n}=68$ $\implies \sqrt{2n}=18$ $\implies 2n=324$ $\implies n=162$
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