Circles are drawn with diameter being any focal chord of the parabola `y^2-4x-y-4=0` with always touch a fixed line. Find its equation.

Circle dawn with diameter as a focal chord of the parabola y^(2)-4x-y-4=0 which always touch the a line 16x+k=0 then the numerical value of k must be

Circle dawn with diameter as a focal chord of the parabola y^(2)-4x-y-4=0 which always touch the a line 16x+k=0 then the numerical value of 'k' must be

Circles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10=0 will touch a fixed line whose equation is

Circles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10 =0 will touch a fixed line whose equation is -

Circles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10 =0 will touch a fixed line whose equation is a. y=1 b. y=-1 c. y=2 d. y=-2

Circles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10 =0 will touch a fixed line whose equation is a. y=1 b. y=-1 c. y=2 d. y=-2

Cicles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10 =0 will touch a fixed line whoose equation is -

The focal chord of the parabola y^2=a x is 2x-y-8=0 . Then find the equation of the directrix.

The focal chord of the parabola y^2=a x is 2x-y-8=0 . Then find the equation of the directrix.

The focal chord of the parabola y^2=a x is 2x-y-8=0 . Then find the equation of the directrix.