Answer
Arithmetic sequence
$d=3$
Work Step by Step
$13-10=10-7=7-4=4-1=3$
So this is arithmetic sequence
$d=a_{n-1}-a_{n}=3$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 11 - Further Topics in Algebra - Summary Exercises on Sequences and Series - Exercises - Page 1038: 2
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