Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.3 Logarithmic Functions - 4.3 Exercises: 20

Answer

$-4$

Work Step by Step

$x=\log _{3}\left( \dfrac {1}{81}\right) \Rightarrow 3^{x}=\dfrac {1}{81}\Rightarrow 3^{x}=3^{-4}\Rightarrow x=-4$
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