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 803: 44

Answer

The graph is shown below.

Work Step by Step

$f\left( x \right)={{\log }_{4}}x$ Assume, $f\left( x \right)=y$ Therefore, the function becomes $y={{\log }_{4}}x$ The function $y={{\log }_{4}}x$ can be written as $x={{4}^{y}}$. Substitute in a selected y value: $\begin{align} & x={{4}^{0}} \\ & =1 \end{align}$ Substitute in a selected y value: $\begin{align} & x={{4}^{1}} \\ & =4 \end{align}$ Substitute in a selected y value: $\begin{align} & x={{4}^{2}} \\ & =16 \end{align}$ Substitute in a selected y value: $\begin{align} & x={{4}^{-1}} \\ & =\frac{1}{4} \end{align}$ Substitute in a selected y value: $\begin{align} & x={{4}^{-2}} \\ & =\frac{1}{16} \end{align}$ Tabulate the obtained values as shown below: $\begin{matrix} {{4}^{y}}=x & y \\ 1 & 0 \\ 4 & 1 \\ 16 & 2 \\ \frac{1}{4} & -1 \\ \frac{1}{16} &-2 \\ \end{matrix}$
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