Precalculus (6th Edition)

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: 14

Answer

$-4$

Work Step by Step

$d=a_{n+1}-a_{n}=-20-\left( -16\right) =-16-\left( -12\right) =-12-\left( -8\right) =-4$
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