The sum of first n terms of an AP is given by the formula Sn=3n^2+n , then it's 3rd term is
a.14 b.16 c.22 d.42
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The sum of first n terms of an AP is given by the formula Sn=3n^2+n , then it's 3rd term is
a.14 b.16 c.22 d.42
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