Question

The points on the parabola $y^2=12x$ whose focal distance is 4 , are

• A.
• B.
• C. (1, 2)
• D. None of these

Answer 1

The correct option is B

a = 3 $\Rightarrow$ abscissa is 4 - 3 = 1 and $y^2=12,y=\pm 2\sqrt{3}.$

Hence points are $(1,2\sqrt{3}),(1,-2\sqrt{3})$ .