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The set of natural numbers N is partitio...

The set of natural numbers N is partitioned into arrays of rows and columns in the form of matrices as `M_1=(1),M_2=((2,3),(4,5)),M_3=((6,7,8),(9,10,11),(12,13,14)),...,M_n=()` and so on. Find the sum of the elements of the

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The correct Answer is:
`(n)/( 6) (2n^(3) +n+3) `
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