In a g.p all terms are positive the 2nd term is 24 and d 4th term is 13(whole num)1/2 find the sum to infinity
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In a g.p all terms are positive the 2nd term is 24 and d 4th term is 13(whole num)1/2 find the sum to infinity

[From: ] [author: ] [Date: 13-07-04] [Hit: ]
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t2 = 24
t4 = 27/2

r = (t4/t2)^(1/2) = (9/16)^(1/2) = 3/4
t1 = 4/3 t2 = 32

sum = t1 (1/(1-r)) = 32 (1/(1-3/4)) = 32 (1/(1/4)) = 32 (4) = 128
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