The Harmonic mean of the segments of a focal chord of the parabola `y^22=4ax` is

The harmonic mean of the segments of a focal chord of the parabola y^(2)=16ax, is

The harmonic mean of the segments of a focal chord of the parabola y^(2)=16ax, is

Prove that the semi-latus rectum of the parabola y^(2) = 4ax is the harmonic mean between the segments of any focal chord of the parabola.

Prove that the semi-latus rectum of the parabola y^(2) = 4ax is the harmonic mean between the segments of any focal chord of the parabola.

Prove that the semi-latus rectum of the parabola y^2 = 4ax is the harmonic mean between the segments of any focal chord of the parabola.

Prove that the semi-latus rectum of the parabola 'y^2 = 4ax' is the harmonic mean between the segments of any focal chord of the parabola.

Prove that the semi-latus rectum of the parabola y^(2) = 4ax is the harmonic mean between the segments of any focal chord of the parabola.

Show that the sum of the reciprocals of the segments of any focal chord of a parabola y^2=4ax is constant.

If b and c are lengths of the segments of any focal chord of the parabola y^(2)=4ax, then write the length of its latus rectum.