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Circles & Conics
hard
0:00.0
Find the eccentricity of the hyperbola
x
y
=
4
xy = 4
x
y
=
4
.
A
1
1
1
B
2
\sqrt{2}
2
C
2
2
2
D
1
/
2
1/\sqrt{2}
1/
2
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