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The eccentricity of an ellipse, with its...

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

`3x^2 +4y^2 =1`

B

`3x^2 +4y^2 =12`

C

`4x^2 +3y^2 =12`

D

`4x^2 +3y^2 =1`

Text Solution

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The correct Answer is:
B
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