Find the condition for the line lx + my + n =0 is a tangent to the circle ` x^(2) + y^(2) = a^(2)`

Find the condition, that the line lx + my + n = 0 may be a tangent to the circle (x - h)^(2) + (y - k)^(2) = r^(2) .

Find the condition for the line lx+my+n=0 to be a tangent to the ellipse x^2/a^2+y^2/b^2=1

Find the condition for the line Ix+my+ n = 0 is a normal to the circle x^2 + y^2 + 2gx + 2fy + c = 0 .

If the line lx + my +n=0 is a tangent to the parabola y^(2)= 4ax , then-

If the line lx+my+n=0 is tangent to the circle x^(2)+y^(2)=a^(2) , then find the condition.

If the line lx+my+n=0 is tangent to the circle x^(2)+y^(2)=a^(2) , then find the condition.

If the line lx+my+n=0 is tangent to the circle x^(2)+y^(2)=a^(2) , then find the condition.

The line lx+my+n=0 is a tangent to the curve y=x-x^2+x^3 , then

The line lx+my+n=0 is a tangent to the curve y=x-x^2+x^3 , then

Find the condition for the straight line lx+my+n=0 to be a tangent to the parabola y^(2)=4ax and find the coordinates of the point of contact.