Sequence and Series

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Question : 39 of 86

Marks: +1, -0

Find the sum of

{n}

terms of the series

1+9+24

+46+75+. . . . . . . . . . . . . .

$\;{n(n+1)(7 n-4)}/{6}$
$\;{n(2 n+1)(4 n-3)}/{6}$
$\;{n(2 n+1)(2 n-3)}/{6}$
None

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