Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Section 9.1 - The Ellipse - Exercise Set - Page 967: 75


See explanations.

Work Step by Step

Step 1. Identify parameters: $a=5, b=4$, center $(0,0)$, horizontal major axis. Step 2. We have $c=\sqrt {a^2-b^2}=3$ Step 3. The foci can be located at $(\pm3, 0)$
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