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The eccentricity of an ellipse, with its...

The eccentricity of an ellipse, with its centre at origin is `(1)/(2)` then the equation of the ellipse is, if one of the directrices is x=4

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
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