Let `P` and `Q` be the points on the parabola `y^2=4x` so that the line segment `PQ` subtends right angle If `PQ` intersects the axis of the parabola at `R,` then the distance of the vertex from `R` is

Let P and Q be the points on the prabola y^(2) = 4x so that the line segment PQ subtends right at the vertex . If PQ intersects the axis of the parabola at R , then the distance of the vertex from R is _

If the segment intercepted by the parabola y^(2)=4ax with the line lx+my+n=0 subtends a right angle at the vertex then:

If the segment intercepted by the parabola y^2=4a x with the line l x+m y+n=0 subtends a right angle at the vertex, then

If the segment intercepted by the parabola y^(2)=4 a x with the line lx+m y+n=0 subtends a right angle at the vertex, then

A line intersects the ellipe (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 at P and Q and the parabola y^(2)=4d(x+a) at R and S. The line segment PQ subtends a right angle at the centre of the ellipse. Find the locus of the point intersection of the tangents to the parabola at R and S.

Find the locus of the middle points of the chords of the parabola y^2=4a x which subtend a right angle at the vertex of the parabola.

Find the locus of the middle points of the chords of the parabola y^2=4a x which subtend a right angle at the vertex of the parabola.

Find the locus of the middle points of the chords of the parabola y^2=4a x which subtend a right angle at the vertex of the parabola.

Find the locus of the middle points of the chords of the parabola y^2=4a x which subtend a right angle at the vertex of the parabola.