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 - Page 727: 6

Answer

$-2,4,-6,8,-10$

Work Step by Step

$a_{n}=2n(-1)^{n}$ Substitute $n=1,2,3,4,5$ in the above formula: $a_{1}=2(1)(-1)^{1}=-2$ $a_{2}=2(2)(-1)^{2}=4$ $a_{3}=2(3)(-1)^{3}=-6$ $a_{4}=2(4)(-1)^{4}=8$ $a_{5}=2(5)(-1)^{5}=-10$
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