Question: (4 points) Prove that for every positive integer n, 123+234++n(n+1)(n+2)=n(n+1)(n+2)(n+3)/4

(4 points) Prove that for every positive integer n, 123+234++n(n+1)(n+2)=n(n+1)(n+2)(n+3)/4

(4 points) Prove that for every positive integer n, 123+234++n(n+1)(n+2)=n(n+1)(n+2)(n+3)/4

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