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: 18

Answer

(a) Vertices: $V(0,±3)$ Foci: $F(0,±\sqrt {34})$ Asymptotes: $y=±\frac{3}{5}x$ (b) Length of the transverse axis: $2a=6$ (c)

Work Step by Step

$25y^2-9x^2=225$ $\frac{y^2}{9}-\frac{x^2}{25}=1$ $\frac{y^2}{3^2}-\frac{x^2}{5^2}=1$ Hyperbola with vertical transverse axis: $\frac{y^2}{a^2}-\frac{x^2}{b^2}=1$ $a=3$ $b=5$ $c^2=a^2+b^2=3^2+5^2=9+25=34$ $c=\sqrt {34}$ (a) Vertices: $V(0,±a)=V(0,±3)$ Foci: $F(0,±c)=F(0,±\sqrt {34})$ Asymptotes: $y=±\frac{a}{b}x=±\frac{3}{5}x$ (b) Length of the transverse axis: $2a=6$
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