engineering mathematics MCQ #348

The directrix of parabola y² = 12x is:

engineering mathematics MCQ #348

  1. Question 1

    Q1. The directrix of parabola y² = 12x is:

    • A) x = -3
    • B) x = 3
    • C) y = -3
    • D) y = 3

    Answer: x = -3

    Explanation: Directrix of y²=4ax is x=-a. 4a=12 => a=3 => x=-3