How many terms are there in the G.P. 3, 6, 12, 24, ... , 384 ?

1.	How many terms are there in the G.P. 3, 6, 12, 24, ... , 384 ?
Answer» Here a = 3 and r = 6 = 2. Let the number of terms be n. 3 Then, tn = 384 arn-1 = 384 3 x 2n - 1 = 384 2n-1 = 128 = 27 n - 1 = 7 n = 8 Number of terms = 8.

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