Answer
The answer is $A_{n}=2x-1$
Work Step by Step
We look at the terms and easily see the terms are going up by 2 each time so the common difference is 2. Also the first term is 2 so the b is $mx+b$ is 1-2=-1. Thus the answer is $A_{n}=2x-1$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 12 - Section 12.1 - Sequences and Summation Notation - 12.1 Exercises - Page 851: 28
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