Please help

Asked by Rahulsinha1993 | 12th Nov, 2009, 09:54: PM

Expert Answer:

Let S be the sum, P the product and R the sum of reciprocals of n terms in a G.P

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

P=an. r (n2-n)/2 

R= (1-r n-1)/arn-1(1-r)

Substitute and simplify

Answered by  | 23rd Nov, 2009, 05:10: PM

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