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WAEC Mathematics 2016 Objective — Question 13

Question 13 of 50 from the West African Examinations Council (WAEC) Mathematics 2016 Objective paper, with the correct answer and a full explanation.

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13. Simplify 2/(1-x) - 1/x. A. (x+1)/(x(1-x)) B. (3x-1)/(x(1-x)) C. (3x+1)/(x(1-x)) D. (x-1)/(x(1-x))

  • A. (x+1)/(x(1-x))
  • B. (3x-1)/(x(1-x))Correct
  • C. (3x+1)/(x(1-x))
  • D. (x-1)/(x(1-x))

Explanation

2/(1-x) - 1/x = (2x-(1-x))/(x(1-x)) = (3x-1)/(x(1-x)).

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