Q. Equation of the directrix of parabola $2x^{2} = 14y$ is equal to
A) $y = - \frac{7}{4}$
B) $x = - \frac{7}{4}$
C) $y = \frac{7}{4}$
D) $y = \frac{7}{4}$
Explanation
(a)
Given parabola is
$2x^{2}\ = 14\ y$
$\Rightarrow \ x^{2} = 7y$
Here, $a = \frac{7}{4}$
$\therefore$ Equation of dierctrix is$\$
$\ y = - \frac{7}{4}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.