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Problem
Problem
If the normals at two points
P
P
P
and
Q
Q
Q
of a parabola
y
2
=
4
a
x
y^2 = 4ax
y
2
=
4
a
x
intersect at a third point
R
R
R
on the curve, then the product of ordinates of
P
P
P
and
Q
Q
Q
is a.
4
a
2
4a^2
4
a
2
b.
2
a
2
2a^2
2
a
2
c.
−
4
a
2
-4a^2
−
4
a
2
d.
8
a
2
8a^2
8
a
2
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