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• 17:06, 10 September 2010 Qin talk contribs uploaded a new version of File:Poison sum 1.png (Reverted to version as of 17:03, 10 September 2010)
• 17:05, 10 September 2010 Qin talk contribs uploaded a new version of File:Posion sum 2.png (Reverted to version as of 17:02, 10 September 2010)
• 17:04, 10 September 2010 Qin talk contribs uploaded a new version of File:Posion sum 2.png (Reverted to version as of 21:34, 20 June 2008)
• 17:04, 10 September 2010 Qin talk contribs uploaded a new version of File:Poison sum 1.png (Reverted to version as of 21:33, 20 June 2008)
• 17:03, 10 September 2010 Qin talk contribs uploaded a new version of File:Poison sum 1.png (More readable version. TeX code: \left(\sum_{n_1}^k 51+108\cdot (k-n)\right)+2 Source of file: http://www.codecogs.com/png.latex?\left(\sum_{n%3D1}^k%2051+108\cdot%20(k-n)\right)+2)
• 17:02, 10 September 2010 Qin talk contribs uploaded a new version of File:Posion sum 2.png (More readable version. TeX code: 51\cdot k+ 108\cdot \frac{(k-1)\cdot k}{2} + 2 = k\cdot (51 + 54\cdot (k-1)) + 2 Source of file: http://www.codecogs.com/png.latex?51\cdot%20k+%20108\cdot%20\frac{(k-1)\cdot%20k}{2}%20+%202%20=%20k\cdot%20(51%20+%2054\cdot)