P is parabola, whose vertex and focus are on the positive x axis at distances a and a' from the origin respectively, then `(a'> a)`. Length of latus ractum of P will be

Explanation

We have given P is parabola, whose vertex and focus are on the positive x axis at distances a and a' from the origin.

Then vertex of the parabola as `x=a`

and focus as `(a',0)`

Then the latus rectum of the parabola is `=4(a'−a)`