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: 26

Answer

(a) Vertices: $V(±a,0)=V(±\frac{1}{3},0)$ Foci: $F(±c,0)=F(±\frac{5}{12},0)$ Asymptotes: $y=±\frac{b}{a}x=±\frac{\frac{1}{4}}{\frac{1}{3}}x=±\frac{3}{4}x$ (b) Length of the transverse axis: $2a=\frac{2}{3}$ (c)

Work Step by Step

$9x^2-16y^2=1$ $\frac{x^2}{\frac{1}{9}}-\frac{y^2}{\frac{1}{16}}=1$ $\frac{x^2}{(\frac{1}{3})^2}-\frac{y^2}{(\frac{1}{4})^2}=1$ Hyperbola with horizontal transverse axis: $\frac{x^2}{a^2}-\frac{y^2}{b^2}=1$ $a=\frac{1}{3}$ $b=\frac{1}{4}$ $c^2=a^2+b^2=\frac{1}{9}+\frac{1}{16}=\frac{25}{144}$ $c=\frac{5}{12}$ (a) Vertices: $V(±a,0)=V(±\frac{1}{3},0)$ Foci: $F(±c,0)=F(±\frac{5}{12},0)$ Asymptotes: $y=±\frac{b}{a}x=±\frac{\frac{1}{4}}{\frac{1}{3}}x=±\frac{3}{4}x$ (b) Length of the transverse axis: $2a=\frac{2}{3}$
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