If the normals at two points \( P \) and \( Q \) of a parabola \( \...

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If the normals at two points \( P \) and \( Q \) of a parabola
\( \mathrm{P} \) \( y^{2}=4 x \) intersect at a third point \( R \) on the parabola

W \( y^{2}=4 x \), then the product of the ordinates of \( P \) and \( Q \) is equal to:
(1) 2
(2) 4
(3) 6
(4) 8
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