Precalculus (6th Edition)

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

Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.2 Exponential Functions - 4.2 Exercises: 78

Answer

$-\dfrac {3}{2}$

Work Step by Step

$e^{3-x}=\left( e^{3}\right) ^{-x}\Rightarrow e^{3-x}=e^{-3x}\Rightarrow 3-x=-3x\Rightarrow 2x=-3\Rightarrow x=-\dfrac {3}{2}$
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