Q1: How many terms are there in the G.P. 3, 6, 12, 24, ... , 384 ?

ANS:A - 8

Here a = 3 and r =	6	= 2. Let the number of terms be n.
	3

Then, t_n = 384     ar^n-1 = 384  3 x 2^{n - 1} = 384  2^n-1 = 128 = 2⁷  n - 1 = 7  n = 8  Number of terms = 8.