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: $a_n=100-9n$
Algebra and Trigonometry 10th Edition
by Larson, Ron
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
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