For each natural number n, the sum 1(2) + 2(3) + .…· + n(n + 1) is equal to: n(2n+1)(2n+2) n(n+1)(2n-1) 3 3 O This option O This option n(n+1)(n+2) None of the choices 3

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A: Given,

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A: The given point is,

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A: To simplify: -72

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