WAEC Further Mathematics 2016 Question 17

Question 17

Sequences and Series

The third and sixth terms of a geometric progression (G.P) are 8/3 and 64/81, respectively. Find the common ratio.

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

Answer: B (2/3)

Explanation

r³ = (64/81) ÷ (8/3) = 8/27, so r = 2/3.