College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 9 - Section 9.2 - Arithmetic Sequences - 9.2 Assess Your Understanding: 7

Answer

Common difference = $1$ The first four terms are: $5, 6, 7, 8$

Work Step by Step

To find the first four terms, substitute $1, 2, 3, 4$ for $n$ in the given formula. $s_1 = 1+4 = 5$ $s_2=2+4 = 6$ $s_3 = 3+4 = 7$ $s_4 = 4+4 = 8$ The terms increase by $1$ unit, so the sequence is arithmetic with a common difference of $1$.
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