A variable line cuts pair of lines `x^2 - (a + b) x + ab = 0` in such a way that intercept between subtends a right angle at origin. The locus of the foot of the perpendicular from origin on variable line is

A line passes through a fixed point A(a, b). The locus of the foot of the perpendicular on it from origin is

A variable line passes through the fixed point (alpha,beta) . The locus of the foot of the perpendicular from the origin on the line is

A variable line passes through the fixed point (alpha,beta) . The locus of the foot of the perpendicular from the origin on the line is,

A variable line moves in such a way that the product of the perpendiculars from (4, 0) and (0, 0) is equal to 9. The locus of the feet of the perpendicular from (0, 0) upon the variable line is a circle, the square of whose radius is

A variable line moves in such a way that the product of the perpendiculars from (4,0) and (0,0) is equal to 9. The locus of the feet of the perpendicular from (0,0) upon the variable line is a circle,the square of whose radius is

A variable line moves in such a way that the product of the perpendiculars from (4, 0) and (0, 0) is equal to 9. The locus of the feet of the perpendicular from (0, 0) upon the variable line is a circle, the square of whose radius is

A variable line moves in such a way that the product of the perpendiculars from (4, 0) and (0, 0) is equal to 9. The locus of the feet of the perpendicular from (0, 0) upon the variable line is a circle, the square of whose radius is