Answer
$4$
Work Step by Step
$d=a_{n+1}-a_{n}=-13-\left( -17\right) =-17-\left( -21\right) =-21-\left( -25\right) =4$
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 - 11.2 Arithmetic Sequences and Series - 11.2 Exercises - Page 1024: 2
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