A. 7
B. 7/2
C. 7/4
D. 7/6
The locus of the point which moves such that the sum of the squares of its distance from (0, a) is 2r2, is
The The limiting points of the coaxal system x2+y2+2µy+9=0 are
If (2, 1 )is limiting point of the coaxal system of which x2+y2-6x-4y-3=0 is a member, then the other limiting point is
The locus of the point of intersection of two perpendicular tangents to the circle x2+y2=a2, x2+y2=b2 is
The equation of the image of the circle x2+y2-6x-4y+12=0 by the line mirror x+y-1=0 is
The inverse point of (1, 2) w.r.t the circle x2+y2=25 is (5, k), then k=
If the points (2, 3), (0, 2), (4, 5) and (0, t) are concyclic, then t=
For the circle x2+y2-4x-2y-36=0, the point (3, 5)
The polars of two points A(1, 3) and B(2, -1) w.r.to the circle x2+y2=9 intersect at C. Then the polar of C w.r.to the circle is
The equation of the chord of the circle x2+y2-4x+6y-3=0 having (1, -2) as its midpoint is