engineering mathematics MCQ #831

If f(x) = ln(x² + 1), then f'(x) =

engineering mathematics MCQ #831

  1. Question 1

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

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

    Answer: 2x / (x² + 1)

    Explanation: Using the chain rule, f'(x) = 1/(x² + 1) * d(x² + 1)/dx = 2x / (x² + 1).