engineering mathematics MCQ #580

What is the directrix of parabola y² = 12x?

engineering mathematics MCQ #580

  1. Question 1

    Q1. What is the directrix of parabola y² = 12x?

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

    Answer: x = -3

    Explanation: Directrix is x = -a = -3 for parabola y² = 4ax (4a = 12 ⇒ a = 3).