G1,G2,…,Gn are said to be n geometric means between a and b if a,G1,…Gn,b is

G1,G2,…,Gn are said to be n geometric means between a and b if a,G1,…Gn,b is

2) If a,d and Sn are first term, common difference and sum of first nth terms of series, then Sb =

3) If a = 3, r = 2, then nth term of G.P is

4) If A, G, H are arithmetic, geometric and harmonic means between a and b respectively, then A,G,H are

5) 5th term of G.P 3,6,12,… is