A. x2+y2=3

B. 9x2+9y2=2

C. 2x2+2y2=9

D. 3x2+3y2=2

The conjugate system of the coaxal system x^{2}+y^{2}+2ax+2by+2λ(ax-by)=0, λ is a parameter, is

The locus of the midpoint of the chord of the circle x^{2}+y^{2}-2x-2y-2=0, which makes an angle of 120^{0} at the centre is

Let A and B be two fixed points, If a perpendicular p is drawn from A to the polar of B with respect to the circle x^{2}+y^{2}=a^{2} and perpendicular q is drawn from B to the polar of A then

The circle x^{2}+y^{2}=4 cuts the circle x^{2}+y^{2}-2x-4=0 at the points A and B. If the circle x^{2}+y^{2}-4x-k=0 passes through A and B then the value of k is

The equation of the circle passing through (-7, 1) and having centre at (-4, -3) is