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WAEC Mathematics 2016 Question 33

Question 33

Logarithms

If log2(3x − 1) = 5, find x.

  1. A.2.00
  2. B.3.67
  3. C.8.67
  4. D.11.00
Show the answer and explanation

Answer: D (11.00)

Explanation

3x − 1 = 2⁵ = 32, so 3x = 33 and x = 11.