Algebra and Trigonometry 10th Edition

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

Chapter 11 - 11.2 - Arithmetic Sequences and Partial Sums - 11.2 Exercises - Page 786: 5

Answer

It is not an arithmetic sequence.

Work Step by Step

A sequence is arithmetic if $a_2-a_1=a_3-a_2=a_4-a_3=a_5-a_4=...=d$ For the given sequence we have that: $a_2-a_1=2-1$ $a_3-a_2=4-2=2$ It is not an arithmetic sequence.
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