Let be the tangent to the parabola and be the tangent to the parabola such that and intersect at . Then at and meet on the st. line.
Option: 1 2x+1=0
Option: 2 x+2=0
Option: 3 x+3=0
Option: 4 x+2y=0
Equation of 1st parabola :
Equation of tangent :
Equation of 2nd parabola :
Equation of tangent :
Now both tangents intersect at 90 degree
Correct Answer: Option C
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