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The nth term of the sequence 3, 9, 27, 81.....is

Mathematics
JAMB 2016
The nth term of the sequence 3, 9, 27, 81.....is
  • A. 3 x 3n-2
  • B. 3 x 3n-1
  • C. 3 x 3n+2
  • D. 3 x 3n+1
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Correct Answer: Option B
Explanation
3,9,27,81,.....
r = \(\frac{9}{8}\) = 3
Tn = arn-1

Tn = 3(3)n-1 = \(\frac{3(3^2)}{3}\)

There is an explanation video available below.

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Explanation Video

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