The sum of the slopes of the lines tangent to both the circles `x^2+y^2=1` and `(x-6)^2+y^2=4` is________

The slope of the tangent to the curve y=6+x-x^2 at (2,4) is

The slope of the tangent to the curve y=6+x-x^(2) at (2,4) is

The slope of the line touching both the parabolas y^2=4x and x^2=−32y is

The slope of the line touching both the parabolas y^2=4x and x^2=−32y is

The slope of the line touching both the parabolas y^2=4x and x^2=−32y is

The slope of the line touching both the parabolas y^(2)=4x and x^(2)=-32y is -

The sum of the slopes of the tangents to the ellipse x^(2)/9+y^(2)/4=1 drawn from the points (6,-2) is

The equation of the line which is tangent to both the circle x^(2)+y^(2)=50 and the parabola y^(2)=40 x is