engineering mathematics MCQ #3668

The value of A in 1 / (x + 2)(x - 1)² = A/(x + 2) + B/(x - 1) + C/(x - 1)² is

engineering mathematics MCQ #3668

  1. Question 1

    Q1. The value of A in 1 / (x + 2)(x - 1)² = A/(x + 2) + B/(x - 1) + C/(x - 1)² is

    • A) 1/9
    • B) -1/9
    • C) 1/3
    • D) -1/3

    Answer: 1/9

    Explanation: Substitute x = -2: 1 = 9A, so A = 1/9.