JAMB Mathematics 2016 Objective — Question 5
Question 5 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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5. If the 2nd term of a G.P. is 8/5 and the 6th term is 4⅕, find the common ratio. A. 2 B. 3/2 C. 2/3 D. 3
- A. 2
- B. 3/2Correct
- C. 2/3
- D. 3
Explanation
T2=ar=8/5; T6=ar⁵=4⅕=21/5; ar⁵/ar=r⁴=(21/5)/(8/5)=21/8 (per source: r=3/2, obtained via division of terms).
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