The set of points on the axis of the parabola from which the three normals to the parabola are all real and different is |
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a) |
b) |
c) |
d) |
None of these |

The set of points on the axis of the parabola from which the three normals to the parabola are all real and different is |
|||||||

a) |
b) |
c) |
d) |
None of these |

1 Answer

127 votes

**(d)**

Given parabola is or

Equation of normal to parabola at any point is

It passes through if

Hence, it has three real values of if > 0

127 votes

127