engineering mathematics MCQ #403

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

engineering mathematics MCQ #403

  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 = 9
    • C) x² + y² = 4
    • D) x² + y² = 5

    Answer: x² + y² = 13

    Explanation: The director circle of an ellipse x²/a² + y²/b² = 1 is x² + y² = a² + b². Here, a² = 9, b² = 4, so x² + y² = 13.