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Compute $1\cdot 2^2+2\cdot 3^2+3\cdot4^2+\cdots+19\cdot 20^2.$

Guest Feb 15, 2020

1⁺⁰ Answers

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Evaluate ∑[n(n +1)^2, n, 1, 19] =41,230

Guest Feb 15, 2020

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