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Let A be a G.P. defined by A = {a, ar, ar2, ar4,…..}, such t [#permalink]
12 Apr 2013, 00:10

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Difficulty:

55% (hard)

Question Stats:

70% (02:15) correct
30% (01:44) wrong based on 74 sessions

Let A be a G.P. defined by A = {a, ar, ar2, ar4,…..}, such that A has an even number of terms. If the sum of terms at odd positions is p and sum of terms at even positions is q, what is the ratio of p to q (take the common ratio as r)?

Re: Let A be a G.P. defined by A = {a, ar, ar2, ar4,…..}, such t [#permalink]
03 Nov 2013, 17:15

Zarrolou wrote:

Let A be a G.P. defined by A = {a, ar, ar2, ar4,…..}, such that A has an even number of terms. If the sum of terms at odd positions is p and sum of terms at even positions is q, what is the ratio of p to q (take the common ratio as r)?

(A) r (B) r2 (C) 1/r2 (D) 1/r (E) None of these

If A = (a, ar, ar^2, ar^4,…), then shouldn't the next terms be ar^8 and ar^16. or am I missing something.

gmatclubot

Re: Let A be a G.P. defined by A = {a, ar, ar2, ar4,…..}, such t
[#permalink]
03 Nov 2013, 17:15