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Mathematics
Problem
Find the equation of an ellipse whose focus is
(
−
1
,
1
)
(-1, 1)
(
−
1
,
1
)
, eccentricity is
1
2
\frac{1}{2}
2
1
and the directrix is
x
−
y
+
3
=
0.
x - y + 3 = 0.
x
−
y
+
3
=
0.
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