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In a GP, the ratio of the sum of the fir...

In a `GP`, the ratio of the sum of the first eleven terms of the sum of the last even terms is `1//8` and the ratio of the sum of all the terms without the first nine to the sum of all terms without the last nine is `2`. Then the number of terms in the `GP` is

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The correct Answer is:
`n = 38`
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