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If the normals at P, Q, R of the parabol...

If the normals at P, Q, R of the parabola `y^2=4ax` meet in O and S be its focus, then prove that `.SP . SQ . SR = a . (SO)^2`.

A

`2^(3)`

B

`a^(2)(SO')`

C

`a(SO')^(2)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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