Answer
$x=-7$
Check:
$2^{x}=2^{-7}=\frac{1}{2^{7}}=\frac{1}{128}$ which is true.
Work Step by Step
$2^{x}=\frac{1}{128}$
$\implies 2^{x}=\frac{1}{2^{7}}$
$\implies 2^{x}=2^{-7}$
$\implies x=-7$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 6 - Exponential Functions and Sequences - Chapter Test - Page 351: 11
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
