Answer
a. ellipses.
b. $x^2+4y^2=4$
Work Step by Step
a. From the given pattern, we can see that it resembles ellipses.
b. There is only one equation for an ellipse from this list -- that is, $x^2+4y^2=4$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 9 - Section 9.2 - The Hyperbola - Exercise Set - Page 983: 65
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