College Algebra 7th Edition

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

Chapter 7, Conic Sections - Section 7.2 - Ellipses - 7.2 Exercises - Page 563: 47

Answer

$\frac{x^2}{9}+\frac{y^2}{13}=1$

Work Step by Step

Major axis is vertical. Foci: $(0,±c)=(0,±2)$ $c=2$ Minor axis: $Length=2b$ $2b=6$ $b=3$ $a^2=b^2+c^2=3^2+2^2=9+4=13$ $a=\sqrt {13}$ Equation of the ellipse: $\frac{x^2}{b^2}+\frac{y^2}{a^2}=1$ $\frac{x^2}{3^2}+\frac{y^2}{(\sqrt {13})^2}=1$ $\frac{x^2}{9}+\frac{y^2}{13}=1$
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