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WAEC Mathematics 2000 Question 29

Question 29

Indices

Given that 27(1 + x) = 9, find x.

  1. A.−3
  2. B.−1/3
  3. C.5/3
  4. D.2.
Show the answer and explanation

Answer: B (−1/3)

Explanation

33(1 + x) = 32, so 3 + 3x = 2 and x = −1/3.