Precalculus (6th Edition) Blitzer

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

Chapter 2 - Section 2.6 - Rational Functions and Their Graphs - Exercise Set - Page 400: 98


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Work Step by Step

Consider the function $g\left( x \right)=\frac{2x-9}{x-4}$ Convert the function into the form: $\text{Quotient}+\frac{\text{Remainder}}{\text{Divisor}}$. $\begin{align} & g\left( x \right)=\frac{2x-9}{x-4} \\ & g\left( x \right)=2+\frac{\left( -1 \right)}{x-4} \end{align}$ Where quotient is $2$ , remainder is $-1,$ and divisor is $x-4$. The rational root is $\begin{align} & x-4=0 \\ & x=4 \end{align}$ The graph of the function $f\left( x \right)=-\frac{1}{x}$ is the mirror image of the function $f$ with respect to the x-axis. When x is changed to x-a, this implies that the graph of the function is shifted by a units to the left. Shift the graph to the right by 4 units: $f\left( x \right)=\frac{-1}{x-4}$. Now, shift the graph upwards by 2 units. The graph has a vertical asymptote along $x=4$. The graph has a horizontal asymptote along $y=2$.
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