engineering mathematics MCQ #751

If y = 1 / (2x + 1), then dy/dx = ?

engineering mathematics MCQ #751

  1. Question 1

    Q1. If y = 1 / (2x + 1), then dy/dx = ?

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

    Answer: -2 / (2x + 1)²

    Explanation: Using quotient rule or chain rule, dy/dx = d(1 / (2x + 1))/dx = -1 / (2x + 1)² * d(2x + 1)/dx = -1 / (2x + 1)² * 2 = -2 / (2x + 1)².