Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - 11.1 - Sequences and Series - 11.1 Exercises - Page 777: 40

Answer

$a_n=100-9n$

Work Step by Step

$a_1=91=100-9=100-9(1)$ $a_2=82=100-18=100-9(2)$ $a_3=73=100-27=100-9(3)$ $a_4=64=100-36=100-9(4)$ $a_5=55=100-45=100-9(5)$ Each term is $9n$ less than 100: $a_n=100-9n$
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