Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 12 - Exponential Functions and Logarithmic Functions - 12.3 Logarithmic Functions - 12.3 Exercise Set - Page 804: 114

Answer

Yes, please see explanation in the step-by-step section.

Work Step by Step

For $x\gt 0$ and $a$, a positive constant other than 1, $\log_{a}x$ is the exponent to which $a$ must be raised in order to get $x$. Thus, $\log_{a}x=m$ means $a^{m}=x$ --- By definition, $\log_{b} a=x$ means that $b^{x}=a.$ Then, applying $(x^{m})^{n}=x^{mn}$, it follows that $b=a^{1/x}$ that is, the exponent by which we raise a to obtain b is $1/x.$ This is written as $\log_{a}b=1/x$
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