Question

For the standard form of the parabola $y^2=-4ax$, the equation of the directrix is $x+a=0$.

• A. True
• B. False
• C. Nither
• D. Either

Answer 1

The correct option is B False

if the equation is $y^2=-4ax$ represents the equation of a parabola whose co-ordinate of the vertex is at $(0,0)$ and the co-ordinates of the focus are $(-a,0)$, then the equation of directrix is $x=a\Rightarrow x-a=0$.