If `m` be the slope of common tangent to the circle `x^2 + y^2 = 16` and ellipse `x^2/25+y^2/4=1` in the first quadrant, then `81m^8 =`

How many tangents to the circle x^2 + y^2 = 3 are normal tothe ellipse x^2/9+y^2/4=1?

Find the number of common tangents to the circle x^2 +y^2=4 and x^2+y^2−6x−8y−24=0

If m be the slope of the tangent to the curve e^(2y) = 1+4x^(2) , then

The number of common tangents of the circles x^(2) +y^(2) =16 and x^(2) +y^(2) -2y = 0 is :

The number of common tangents to the circles x^2+y^2-x = 0 and x^2 + y^2 + x = 0 are

If l is the length of the intercept made by a common tangent to the circle x^2+y^2=16 and the ellipse (x^2)/(25)+(y^2)/(4)=1 , on the coordinate axes, then 81l^2+3 is equal to

A common tangent to the circles x^(2)+y^(2)=4 and (x-3)^(2)+y^(2)=1 , is

The number of common tangents of the circles x^2+y^2−2x−1=0 and x^2+y^2−2y−7=0

Find the number of common tangent to the circles x^2+y^2+2x+8y-23=0 and x^2+y^2-4x-10 y+9=0

The equation of common tangent of the curve x^(2) + 4y^(2) = 8 and y^(2) =4x are