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UI Post-UTME Mathematics 2022 (Model questions) Question 11

Question 11

Progressions

If the second term of a G.P is 8/9 and the 6th term is 4½. Find the common ratio

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

Answer: C (3/2)

Explanation

ar⁵ ÷ ar = r⁴ = (9/2) ÷ (8/9) = 81/16, so r = 3/2.