Answer
$\{ 1.792\}$
Work Step by Step
$4^x=12 \longrightarrow x\ ln4=ln12 \longrightarrow x=\frac{ln12}{ln4}\approx1.792$ or $\{ 1.792\}$
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 4 - Inverse, Exponential, and Logarithmic Functions - Chapter 4 Test Prep - Review Exercises - Page 492: 36
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