College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 7, Conic Sections - Section 7.3 - Hyperbolas - 7.3 Exercises - Page 585: 21

Answer

(a) Vertices: $V(±a,0)=V(±\sqrt 2,0)$ Foci: $F(±c,0)=F(±\sqrt {10},0)$ Asymptotes: $y=±\frac{b}{a}x=±\frac{\sqrt 2}{2\sqrt 2}x=±\frac{1}{2}x$ (b) Length of the transverse axis: $2a=4\sqrt 2$ (c)

Work Step by Step

$x^2-4y^2-8=0$ $x^2-4y^2=8$ $\frac{x^2}{8}-\frac{y^2}{2}=1$ $\frac{x^2}{(2\sqrt 2)^2}-\frac{y^2}{(\sqrt 2)^2}=1$ Hyperbola with horizontal transverse axis: $\frac{x^2}{a^2}-\frac{y^2}{b^2}=1$ $a=2\sqrt 2$ $b=\sqrt 2$ $c^2=a^2+b^2=8+2=10$ $c=\sqrt {10}$ (a) Vertices: $V(±a,0)=V(±\sqrt 2,0)$ Foci: $F(±c,0)=F(±\sqrt {10},0)$ Asymptotes: $y=±\frac{b}{a}x=±\frac{\sqrt 2}{2\sqrt 2}x=±\frac{1}{2}x$ (b) Length of the transverse axis: $2a=4\sqrt 2$
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