Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 3 - Section 3.3 - Properties of Logarithms - Exercise Set - Page 476: 102

Answer

False. A possible true statement: $ e^{x}=\ln e^{e^{x}}$

Work Step by Step

Substituting $ x=e $, the LHS equals $ e^{e},$ and the RHS equals $\displaystyle \frac{1}{\ln e}=\frac{1}{1}=1$, so the statement is false (we can find an x for which the equation is false). To make it true, write an expression involving $\ln $ so it equals $ e^{x}$. For example, we know that $\ln e^{y}=y $, so we put $ y=e^{x}:$ $\ln e^{e^{x}}=e^{x}$
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