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1.
The normal chord of a parabola 
at 
subtends a right angle at the
at subtends a right angle at the
2.
The equation of the circle which has a tangent 
at 
on it and with the centre on 
is
at on it and with the centre on is
3.
The equation of the tangent to the parabola 
which goes through the point 
, is
which goes through the point , is
4.
The length of the chord of the circle 
along the 
-axis, is
along the -axis, is
5.
What is the slope of the tangent drawn to the hyperbola 
at the point 
at the point