`P(alpha,alpha)` is a point on the parabola `y^(2)=4ax`. Show that the normal chord of the parabola at P subtends a right angle at its focus.

A normal chord of the parabola y^2=4ax subtends a right angle at the vertex if its slope is

A normal chord of the parabola y^2=4ax subtends a right angle at the vertex if its slope is

A normal chord of the parabola y^2=4ax subtends a right angle at the vertex if its slope is

A normal chord of the parabola y^(2)=4ax subtends a right angle at the vertex if its slope is

Locus of the feet of the perpendiculars drawn from vertex of the parabola y^(2)=4ax upon all such chords of the parabola which subtend a right angle at the vertex is

The normal chord of a parabola y^2= 4ax at the point P(x_1, x_1) subtends a right angle at the