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

a)

b)

c)

d)



Question ID - 55852 | SaraNextGen Top Answer

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

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (a) -

(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