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: 10


It is an arithmetic sequence. $d=-0.7$

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: $a_2-a_1=5.9-6.6=-0.7$ $a_3-a_2=5.2-5.9=-0.7$ $a_4-a_3=4.5-5.2=-0.7$ $a_5-a_4=3.8-4.5=-0.7$ It is an arithmetic sequence. Common difference: $d=-0.7$
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