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WAEC Mathematics 1997 Question 31

Question 31

Indices

Find the value of t for which 64/27 = (3/4)t−1

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

Answer: B (−2)

Explanation

64/27 = (4/3)3 = (3/4)−3, so t − 1 = −3 and t = −2.