Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 11: Parametric Equations and Polar Coordinates - Section 11.6 - Conic Sections - Exercises 11.6 - Page 679: 68

Answer

Center: $(2,0)$ Foci: $(0,\pm \sqrt{10})$ Vertices: $(2, \pm 2\sqrt 2)$ Asymptote: $y=±2x \mp 4$

Work Step by Step

$y^2-4x^2+16x=24$ $y^2-4(x^2 -4x+ \textbf{4})=24 \textbf{ - 16}$ $y^2 -4(x-2)^2=8$ Hyperbola form: $\frac{y^2}{8} - \frac{4(x-2)^2}{8}=1$ $\qquad \qquad \qquad \enspace \frac{y^2}{8} - \frac{(x-2)^2}{2}=1$ $\qquad \qquad \qquad \enspace \frac{y^2}{(2\sqrt 2)^2} - \frac{(x-2)^2}{(\sqrt 2)^2}=1$ $\qquad \qquad \qquad \enspace \qquad \enspace h=2,k=0,a=\sqrt 2,b=2\sqrt 2$ Linear eccentricity (focal distance): $c= \sqrt{a^2+b^2}$ $\qquad \qquad \qquad \qquad \qquad \hspace{3em} c=\sqrt{(\sqrt2)^2+(2\sqrt2)^2}$ $\qquad \qquad \qquad \qquad \qquad \hspace{3em} c=\sqrt {10}$ Center: $(h,k)$ $\qquad \quad (2,0)$ Foci: $(h,k±c)$ $\qquad (2,0±\sqrt{10})$ $\qquad (2,\pm \sqrt{10})$ Vertices: $(h,k±b)$ $\qquad \quad \enspace (2, 0\pm 2\sqrt 2)$ $\qquad \quad \enspace (2, \pm 2\sqrt 2)$ Asymptote: $y=±\frac{b}{a}(x−h)+k$ $\qquad \qquad \enspace y=±\frac{2\sqrt 2}{\sqrt 2}(x-2)+0$ $\qquad \qquad \enspace y=±2x \mp 4$
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