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If P, Q, R are three points on a parabol...

If P, Q, R are three points on a parabola `y^2=4ax` whose ordinates are in geometrical progression, then the tangents at P and R meet on :

A

the line through Q parallel to x-axis

B

the line through Q parallel to y-axis

C

the line joining Q to the vertex

D

the line joining Q to the focus.

Text Solution

Verified by Experts

The correct Answer is:
B
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