Total number of lines touching atleast two circles of the family of four circles `x^(2) + y^(2) +- 8x +- 8y = 0` is

Circle x^(2) + y^(2) - 8x + 4y + 4 = 0 touches

The circle x^(2) + y^(2)- 8x + 4y + 4=0 touches

The circle x^2 + y^2 - 8x + 4y +4 = 0 touches

The circle x ^(2) +y^(2) -8 x+4=0 touches -

If the radius of the circle touching the pair of lines 7x^(2) - 18 xy +7y^(2) = 0 and the circle x^(2) +y^(2) - 8x - 8y = 0 , and contained in the given circle is equal to k, then k^(2) is equal to

If the radius of the circle touching the pair of lines 7x^(2) - 18 xy +7y^(2) = 0 and the circle x^(2) +y^(2) - 8x - 8y = 0 , and contained in the given circle is equal to k, then k^(2) is equal to

If line 3x - y + c = 0 touches circle x^(2) + y^(2) - 2x + 8y - 23 =0 , then c =

The centre of the smallest circle touching the circles x^2+ y^2-2y -3=0 and x^2 +y^ 2-8x -18y +93= 0 is:

The centre of the smallest circle touching the circles x^2+ y^2-2y -3=0 and x^2 +y^ 2-8x -18y +93= 0 is:

Find the equation of the family of circles touching the lines x^(2)-y^(2)+2y-1=0