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Answers and rating deltas for

How do you get N(N+1) from N+1 + N + 1 + ... + N + 1 + N + 1?

Author Votes Δ
Upul Bandara 9 +4.60
Ignacio Vazquez-Abrams 4 +0.14
Carsten 3 -0.71
Doc Brown 2 -3.87
Last visited: Sep 14, 2014, 5:07:29 AM