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

a sequence

not a sequence

G.P

A.P

Answer : C

Sponsored Ad

अगर आप कम्पटीशन एग्जाम की ऑनलाइन तैयारी कर रहे है तो यहाँ से आप फ्री में Online Test

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

2.3n-1

2) Sum of n terms of G.P is

n/2[2a+(n-1)d]

a(1-rn)/(1-r)

2ab/(a+b)

a+b/2

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

n/2[2a+(n-1)d]

n/2[a+(n-1)d]

n/[2a+(n-1)d]

a+(n-1)d

4) 5th term of G.P 3,6,12,… is

15

48

2

3

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

in G.P

in A.P

in H.P

Real numbers