The locus of a point on the variable parabola whose distance from focus is always equal to is equal to: ( is parameter) |
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a) |
b) |
c) |
d) |

The locus of a point on the variable parabola whose distance from focus is always equal to is equal to: ( is parameter) |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

**(a)**

Let the point be

Then according to question,

Let is the moving point, then

and

point lies on

On substituting these values in Eq. (i),

is the required locus

127 votes

127