Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 3 - Polynomial and Rational Functions - 3.5 Rational Functions: Graphs, Applications, and Models - 3.5 Exercises - Page 374: 28

Answer

shift $\frac{1}{x^2}$ to the right 4 units, reflect across the x-axis, then shift up 2 units, (a) domain $(-\infty,4)U(4,\infty)$ (b) range $(-\infty,2)$ (c) increasing $(4,\infty)$ (d) decreasing $(-\infty,4)$

Work Step by Step

To get the graph of $f(x)=\frac{-1}{(x-4)^2}+2$, shift $\frac{1}{x^2}$ to the right 4 units, reflect across the x-axis, then shift up 2 units. See graph, we can identify the following: (a) domain $(-\infty,4)U(4,\infty)$ (b) range $(-\infty,2)$ (c) increasing $(4,\infty)$ (d) decreasing $(-\infty,4)$
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