Question - In the series 2, 6, 18, 54, ...... what will be the 8th term ?
A. 4370
B. 4374
C. 7443
D. 7434
Answer -
Option B
Explanation:
Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,.....
So, the series is a G.P. in which a = 2, r = 3.
Therefore 8th term = ar8-1 = ar7 = 2 x 37 = (2 x 2187) = 4374.