Answer
$I$
Work Step by Step
The equation $y^{2}=x^{2}+2z^{2}$ is a double cone, and the only double cone graph can be seen in Figure $I$.
Multivariable Calculus, 7th Edition
by Stewart, James
Published by
Brooks Cole
ISBN 10:
0-53849-787-4
ISBN 13:
978-0-53849-787-9
Chapter 12 - Vectors and the Geometry of Space - 12.6 Exercises - Page 857: 26
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