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10, 20, 30, \\ldots

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Q.If the sum of the first n terms of a series is Sn=3n2+7nS_n = 3n^2 + 7nSn​=3n2+7n, then the series is

Correct Answer: Option A

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Q.If the sum of the first n terms of a series is $S_n = 3n^2 + 7n$ , then the series is