engineering mathematics MCQ #599

The directrix of parabola y² = 8x is

engineering mathematics MCQ #599

  1. Question 1

    Q1. The directrix of parabola y² = 8x is

    • 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. Directrix is x = -2.