" If the circle "x^(2)+y^(2)+4x+22y+c=0" bisects the circumference of the circle "x^(2)+y^(2)-2x+8y-d=0," then "

If the circle x^(2) + y^(2) + 4x + 2y + c = 0 bisects the cirucumference of the cirlce x^(2) + y^(2) -2x -8y -d = 0 then c + d =

If the circle x^(2) + y^(2) + 4x + 2y + c = 0 bisects the cirucumference of the cirlce x^(2) + y^(2) -2x -8y -d = 0 then c + d =

If the circle x^(2)+y^(2)+6 x-2 y+k=0 bisects the circumference of the circle x^(2)+y^(2)+2 x-6 y-15-0 then k=

If the circle x^(2)+y^(2)+4x+22y+a=0 bisects the circumference of the circle x^(2)+y^(2)-2x+8y-b=0 (where a,b>0) then find the maximum value of (ab).

If the circle x^(2)+y^(2)+4x+22y+a=0 bisects the circumference of circle x^(2)+y^(2)-2x+8y+b=0, then a-b equals to

If the circle x^(2)+y^(2)=4 bisects the circumference of the circle x^(2)+y^(2)-2x+6y+a=0 , then 'a' equals

If the circle x^(2) + y^(2) + 6x - 2y + k = 0 bisects the circumference of the circle x^(2) + y^(2) +2x - 6y - 15 = 0 , then k =

If the circle x^2 + y^2 + 6x -2y + k = 0 bisects the circumference of the circle x^2 + y^2 + 2x- 6y-15=0 , then

If the circle x^(2) + y^(2) + 4x - 6y - c = 0 bissects the circumference of the circle x^(2) + y^(2) - 6x + 4y - 12 = 0 , then c =