Let S(n) be the sum of first n terms of ...

Let `S_(n)` be the sum of first n terms of an A.P. If `S_(2n) = 5s_(n)`, then find the value of `S_(3n) : S_(2n)`.

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The correct Answer is:

`12 : 5`

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CHHAYA PUBLICATION-SEQUENCE AND SERIES-Exercise 9 B (Long Answer Type Questions)

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