engineering mathematics MCQ #753

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

engineering mathematics MCQ #753

  1. Question 1

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

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

    Answer: -2 / (x - 1)²

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