WAEC Mathematics 2020 Objective — Question 12
Question 12 of 50 from the West African Examinations Council (WAEC) Mathematics 2020 Objective paper, with the correct answer and a full explanation.
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The first term of a Geometric Progression (G.P) is 3 and the 5th term is 48. Find the common ratio.
- A. 2Correct
- B. 4
- C. 8
- D. 16
Explanation
T5 = ar^4: 48 = 3r^4, so r^4=16, giving r = 16^(1/4) = 2.
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