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Mathematics examination questions of Jilin province preliminaries in 2006
s 1+S2+0...+sn=2007*2006

The sum of the preceding paragraphs (1, p 1, p2, …, p2006) is 1, S 1+ 1, S2+ 1, ... sn+/kloc-.

The Cai Shaluo sum of this series is 2007 February/2007 = 2007.