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Prove that = n(n+1)(2n+ 1)(3n+3n-1)/30 whenever n is a positive integer.


Prove that = n(n+1)(2n+ 1)(3n+3n-1)/30 whenever n is a positive integer.

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1 2 gives Summing both sides from k 1 to n we get n k 15 k 1 k... blur-text-image

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