Mark the correct alternative in each of the following:
Let S be the sum, P be the product and R be the sum of the reciprocals of 3 terms of a G.P. then P2R3 : S3 is equal to
Let, 3 terms of the G.P. be a , a, ar
S = a
+ a + ar = 
P = a × a × ar = a3
P2 = a6
R = ra + 1a + 1ar = 
Then, P2R3 : S3
⇒ 
⇒ 
⇒ 1 : 1
1