Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 11 - Section 11.1 - Sequences and Summation Notation - Exercise Set - Page 829: 8



Work Step by Step

Need to find the first four terms of $a_n={(-1)^{n+1}}{(n+4)}$ when $n=1,2,3,4$ Thus, $a_1={(-1)^{1+1}}{(1+4)}=5$ $a_2={(-1)^{2+1}}{(2+4)}=-6$ $a_3={(-1)^{3+1}}{(3+4)}=7$ $a_4={(-1)^{4+1}}{(4+4)}=-8$ Hence, the first four terms are: $5,-6,7,-8$
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