13
28
37
18
Correct answer is D
2, 1, 12, 14.....
There are 4 terms in the series
Therefore the next number will be the 5th term
Tn = arn−1 (formular for geometric series)
a = first term = 2
r = common rate = next termprevious term = 12
n = number of terms
T5 = 5th term = ?
T5 = ar5−1
= ar4
= 2 × (arn−1)4
= 2 × 116
= 18
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