Precalculus (6th Edition)

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

Chapter 10 - Analytic Geometry - Chapter 10 Test Prep - Review Exercises - Page 1001: 38

Answer

$$\eqalign{ & {\text{Vertices}}:\left( { - 5,2} \right){\text{ and }}\left( {3,2} \right) \cr & {\text{Asymptotes: }}y = \pm \frac{1}{2}\left( {x + 1} \right) + 2 \cr & {\text{domain: }}\left( { - \infty , - 5} \right] \cup \left[ {3,\infty } \right) \cr & {\text{range: }}\left( { - \infty , + \infty } \right) \cr} $$

Work Step by Step

$$\eqalign{ & \frac{{{{\left( {x + 1} \right)}^2}}}{{16}} - \frac{{{{\left( {y - 2} \right)}^2}}}{4} = 1 \cr & {\text{The equation is written in the form }}\frac{{{{\left( {x - h} \right)}^2}}}{{{a^2}}} - \frac{{{{\left( {y - k} \right)}^2}}}{{{b^2}}} = 1 \cr & \frac{{{{\left( {x + 1} \right)}^2}}}{{16}} - \frac{{{{\left( {y - 2} \right)}^2}}}{4} = 1,{\text{ then }}a = 4,\,\,b = 2,\,\,\,h = - 1,\,\,\,k = 2 \cr & c = \sqrt {{a^2} + {b^2}} = \sqrt {144 + 81} = 15 \cr & \cr & {\text{Characteristics:}} \cr & {\text{Transverse axis: horizontal}} \cr & {\text{vertices: }}\left( {h \pm a,k} \right) \cr & {\text{vertices: }}\left( { - 1 \pm 4,2} \right) \cr & {\text{vertices: }}\left( { - 5,2} \right){\text{ and }}\left( {3,2} \right) \cr & \cr & {\text{asymptotes: }}y = \pm \frac{b}{a}\left( {x - h} \right) + k \cr & {\text{asymptotes: }}y = \pm \frac{1}{2}\left( {x + 1} \right) + 2 \cr & \cr & {\text{The domain is: }}\left( { - \infty ,h - a} \right] \cup \left[ {h + a,\infty } \right) \cr & {\text{domain: }}\left( { - \infty , - 5} \right] \cup \left[ {3,\infty } \right) \cr & {\text{The range is: }}\left( { - \infty , + \infty } \right) \cr & {\text{Graph}} \cr} $$
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