Calculus: Early Transcendentals 9th Edition

Published by Cengage Learning
ISBN 10: 1337613924
ISBN 13: 978-1-33761-392-7

Chapter 10 - Section 10.5 - Conic Sections - 10.5 Exercises - Page 708: 20

Answer

Foci: $(\pm 10,0)$, Vertices: $(\pm 6,0)$, Asymptotes: $y=\pm\frac{4}{3}x$.

Work Step by Step

Recall: The hyperbola $\frac{x^2}{a^2}-\frac{y^2}{b^2}=1$ has the foci $(\pm c,0)$ where $c^2=a^2+b^2$, the vertices $(\pm a,0)$, and the asymptotes $y=\pm(b/a)x$ We have $\frac{x^2}{36}-\frac{y^2}{64}=1$. Then, $a^2=36\to a=6$ $b^2=64\to b=8$ $c=\sqrt{a^2+b^2}=\sqrt{36+64}=\sqrt{100}=10$ So, the foci are $(\pm 10,0)$, the vertices are $(\pm 6,0)$, and the asymptotes are $y=\pm\frac{8}{6}x=\pm\frac{4}{3}x$.
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