Calculus: Early Transcendentals (2nd Edition)

Published by Pearson
ISBN 10: 0321947347
ISBN 13: 978-0-32194-734-5

Chapter 10 - Parametric and Polar Curves - 10.4 Conic Sections - 10.4 Exercises - Page 751: 45

Answer

$$\eqalign{ & {\text{Vertices }}\left( { \pm 4,0} \right){\text{ and foci}}\left( { \pm 6,0} \right) \cr & {\text{Asymptotes: }}y = \frac{{\sqrt 5 }}{2}x{\text{ and }}y = - \frac{{\sqrt 5 }}{2}x \cr} $$

Work Step by Step

$$\eqalign{ & {\text{Vertices }}\left( { \pm 4,0} \right){\text{ and foci}}\left( { \pm 6,0} \right) \cr & {\text{The equation of the hyperbola is given by: }}\frac{{{x^2}}}{{{a^2}}} - \frac{{{y^2}}}{{{b^2}}} = 1,{\text{ with}} \cr & {\text{Vertices }}\left( { \pm a,0} \right){\text{ and Foci }}\left( { \pm c,0} \right) \cr & {\text{Then,}} \cr & a = 4{\text{ and }}c = 6 \cr & b = \sqrt {{c^2} - {a^2}} \cr & b = \sqrt {{6^2} - {4^2}} \cr & b = 2\sqrt 5 \cr & \frac{{{x^2}}}{{{a^2}}} - \frac{{{y^2}}}{{{b^2}}} = 1\,\,\,\, \Rightarrow \,\,\,\,\,\frac{{{x^2}}}{{{{\left( 4 \right)}^2}}} - \frac{{{y^2}}}{{{{\left( {2\sqrt 5 } \right)}^2}}} = 1 \cr & \frac{{{x^2}}}{{16}} - \frac{{{y^2}}}{{20}} = 1 \cr & \cr & {\text{Asymptotes: }}y = \frac{b}{a}x{\text{ and }}y = - \frac{b}{a}x \cr & {\text{Asymptotes: }}y = \frac{{\sqrt 5 }}{2}x{\text{ and }}y = - \frac{{\sqrt 5 }}{2}x \cr & \cr & {\text{Graph}} \cr} $$
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