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Offline Centres

Q.

A tangent at the point $P (20, 25)$ to a parabola intersects its directrix at $(- 10, 9)$ . If the focus of the parabola lies on $x -$ axis, the number of such parabolas are

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answer is 1.

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Detailed Solution

The segment of tangent between point of contact and directrix subtends $90 °$ at focus.

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