engineering mathematics MCQ #379

Find the directrix of the parabola y² = -8x.

engineering mathematics MCQ #379

  1. Question 1

    Q1. Find the directrix of the parabola y² = -8x.

    • A) x = 2
    • B) x = -2
    • C) y = 2
    • D) y = -2

    Answer: x = 2

    Explanation: For y²=4ax, directrix is x = -a. Here 4a=8 ⇒ a=2 ⇒ x=-2.