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Variable ellipses are drawn with x= -4 a...

Variable ellipses are drawn with `x= -4` as a directrix and origin as corresponding foci. The locus of extremities of minor axes of these ellipses is:

A

`y^2=4x`

B

`y^2=2x`

C

`y^2=x`

D

`x^2=4y`

Text Solution

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The correct Answer is:
A
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