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Questions  >>  CBSE XI  >>  Math  >>  Sequences and Series
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Find the sum of n terms of the series 3×12+5×22+7×32+.........

n(n+1)(3n2+5n+1)3n(n+1)(3n2+5n+1)6n(n+1)(3n2+5n1)6n(n+1)(3n2+5n1)3

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