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: 7


It is an arithmetic sequence. $d=-2$

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: $a_2-a_1=8-10=-2$ $a_3-a_2=6-8=-2$ $a_4-a_3=4-6=-2$ $a_5-a_4=2-4=-2$ It is an arithmetic sequence. Common difference: $d=-2$
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