Posted by Elyse on Wednesday, May 15, 2013 at 1:33pm.
describe the surface and give traces :
x = y^2  4z^2

Calculus  Steve, Wednesday, May 15, 2013 at 3:00pm
It's a hyperbolic paraboloid
for y=k, x = k^24z^2
for z=k, x = y^24k^2
both are parabolas
for x=k, y^24z^2 = k^2
is a hyperbola
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