engineering mathematics MCQ #963

If f(x) = 1 / (1 + x²), then f'(x) = ?

engineering mathematics MCQ #963

  1. Question 1

    Q1. If f(x) = 1 / (1 + x²), then f'(x) = ?

    • A) -2x / (1 + x²)²
    • B) 2x / (1 + x²)²
    • C) -x / (1 + x²)
    • D) x / (1 + x²)

    Answer: -2x / (1 + x²)²

    Explanation: Apply the quotient rule or recognize it as a derivative of arctan(x) related form.