`x-2y+4=0` is a common tangent to `y^2=4x and x^4/4+y^2/b^2=1.` Then the value of b and the other common tangent are given by : (A) `b=sqrt3` (B) `x+2y+4=0` (C) `b=3` (D) `x-2y-4=0`

x-2y+4=0 is a common tangent to y^(2)=4x and (x^(4))/(4)+(y^(2))/(b^(2))=1. Then the value of b and the other common tangent are given by : (A) b=sqrt(3)(B)x+2y+4=0(C)b=3 (D) x-2y-4=0

If y=mx+4 is common tangent to parabolas y^(2)=4x and x^(2)=2by . Then value of b is

If y=mx+4 is common tangent to parabolas y^(2)=4x and x^(2)=2by . Then value of b is

The equation of common tangent to the curves y^2 =4x and xy=2 is (A) x+2y-4=0 (B) x+2y+4=0 (C) x-2y+4=0 (D) x-2y-4=0

The equation of common tangent to the curves y^2 =4x and xy=2 is (A) x+2y-4=0 (B) x+2y+4=0 (C) x-2y+4=0 (D) x-2y-4=0

The equation of common tangent to the curves y^2 =4x and xy=2 is (A) x+2y-4=0 (B) x+2y+4=0 (C) x-2y+4=0 (D) x-2y-4=0

Equation of common tangent to parabola y^2 = 2x and circle x^2 + y^2 + 4x = 0

Find the equation (s) of the common tangent(s) to the parabola y^(2) - 4x - 2y + 5 =0 and y^(2) = -4x .