passpadi

2016

Mathematics

JAMB

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

Correct Answer: 3 x 3n-1

Explanation

3,9,27,81,..... r = 9/8 = 3 Tn = arn-1 Tn = 3(3n-1 = 3(32)/3

3,9,27,81,..... r = 9/8 = 3 Tn = arn-1 Tn = 3(3n-1 = 3(32)/3
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