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Let S(n) denote the sum of the first n t...

Let `S_(n)` denote the sum of the first n terms of an A.P. If `S_(2n) = 3S_(n)`, then `S_(3n) : S_(n)` is equal to `:`

A

4

B

6

C

8

D

10

Text Solution

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The correct Answer is:
B
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