College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 8, Sequences and Series - Section 8.3 - Geometric Sequences - 8.3 Exercises - Page 614: 9


$a_n=7(4)^{n-1}$ $a_4=448$

Work Step by Step

We are given: $a=7, r=4$ We know that a geometric sequence has the form: $a_{n}=ar^{n-1}$ $a_n=7(4)^{n-1}$ Thus: $a_4=7* 4^{3}=448$
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