Question: 1 +2+3+...+2012 +2013 + 2014 1+2+3+ + 2012 + 2013 + 2014 ... Hint: 12 +2+3+...+ n = n(n+1) (2n + 1). ?

1 +2+3+...+2012 +2013 + 2014 1+2+3+ + 2012 + 2013 + 2014

1 +2+3+...+2012 +2013 + 2014 1+2+3+ + 2012 + 2013 + 2014 ... Hint: 12 +2+3+...+ n = n(n+1) (2n + 1). ?

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