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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2004
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Q)
The eccentricity of an ellipse, with its centre at the origin, is
1
2
. If one of the directrices is
x
=
4
, then the equation of the ellipse is
( A )
3
x
2
+
4
y
2
=
12
( B )
4
x
2
+
3
y
2
=
1
( C )
4
x
2
+
3
y
2
=
12
( D )
3
x
2
+
4
y
2
=
1
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