The line `3x-2y=k` meets the circle `x^(2)+y^(2)=4r^(2)` at only one point, if `k^(2)=`

The number of intergral values of k for which the line, 3x+4y=k intersects the circle, x^(2)+y^(2)-2x-4y+4=0 at two district points is ______

The line x+y=k meets the pair of straight lines x^(2)+y^(2)-2x-4y+2=0 in two points A and B. If O is the origin and angleAOB=90^(@) then the value of kgt1 is

The line 3x -4y = k will cut the circle x^(2) + y^(2) -4x -8y -5 = 0 at distinct points if

The line 3x -4y = k will cut the circle x^(2) + y^(2) -4x -8y -5 = 0 at distinct points if

The line 3x+6y=k intersects the curve 2x^(2)+3y^(2)=1 at points A and B .The circle on AB as diameter passes through the origin. Then the value of k^(2) is

If 4x+3y+k=0 touch the circle 2x^(2)+2y^(2)=5x then k=

If the straight line 3x + 4y = k touches the circle x^(2) + y^(2) = 16 x , then the values of k are