Precalculus (6th Edition)

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

Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.4 Evaluation Logarithms and the Change-of-Base Theorem - 4.4 Exercises - Page 457: 48

Answer

$ -4$

Work Step by Step

$ln\ \frac{1}{e^4}=ln\ e^{-4}=-4\ ln(e)=-4$
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