Answer
$1$
Work Step by Step
RECALL:
$y=\ln{x} \longrightarrow e^y=x.$
Let $y=\ln{e}.$
Use the rule above to obtain
$y=\ln{e} \longrightarrow e^y=e.$
Use the rule "if $a^x=a^y$, then $x=y$" to obtain
$y=1.$
Therefore, $\ln{e}= 1.$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 3 - Section 3.2 - Exponential Functions - Exercise Set - Page 464: 88
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