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How many terms of the G.P. 3,3//2,3//4, ...

How many terms of the G.P. `3,3//2,3//4, ` be taken together to make `(3069)/(512)?`

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Sum of the terms Sn​`=3069/512`
First term `a=3 `
Common ratio `r=(3/2)/3 =(3/2)×(1/3) =1/2`
We know that,
`S_n​=a(1−r^n)/(1−r)`
`(3069/512)=3[1−(1/2)^n]/ ...
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