engineering mathematics MCQ #545

The equation of the director circle of the ellipse x²/9 + y²/4 = 1 is?

engineering mathematics MCQ #545

  1. Question 1

    Q1. The equation of the director circle of the ellipse x²/9 + y²/4 = 1 is?

    • A) x² + y² = 13
    • B) x² + y² = 12
    • C) x² + y² = 11
    • D) x² + y² = 10

    Answer: x² + y² = 13

    Explanation: The director circle of x²/a² + y²/b² = 1 is x² + y² = a² + b². Here, it's x² + y² = 9 + 4 = 13.