The first term of a geometric progression (G.P) is 3 and the 5th term is...
MATHEMATICS
WAEC 2020
The first term of a geometric progression (G.P) is 3 and the 5th term is 48. Find the common ratio.
- A. 2
- B. 4
- C. 8
- D. 16
Correct Answer: A. 2
Explanation
T\(_5\) = ar\(^4\)
\(\frac{48}{3} = \frac{3r^4}{3}\)
16 = r\(^4\)
r = \(4\sqrt{16}\)
= 2
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