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Find the sum to n terms series 1^(2) + ...

Find the sum to n terms series `1^(2) + (1^(2) + 2^(2)) (1^(2) + 2^(2) + 3^(2)) + ` . . . . .

Text Solution

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The correct Answer is:
`(n(n+1)^2(n+2))/12`
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