Answer
It is not arithmetic.
Work Step by Step
We are given
$128, 64, 32, 16$
__________________
$+64 ; + 32; +16$
The sequence does not have a common difference, so it is not arithmetic.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 4 - An Introduction to Functions - Chapter Test - Page 287: 15
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