If the normals at the ends of a variable chord \( P Q \) of \( \mat...

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If the normals at the ends of a variable chord \( P Q \) of
\( \mathrm{P} \) the parabola \( y^{2}-4 y-2 x=0 \) are perpendicular, then

W the tangents at \( P \) and \( Q \) will intersect at:
(1) \( x+y=3 \)
(2) \( 3 x-7=0 \)
(3) \( y+3=0 \)
(4) \( 2 x+5=0 \)
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