證明:(http://i.imgur.com/BbPSQSf.png)
(http://i.imgur.com/w1I09nu.png)
http://i.imgur.com/ht3E3G9.png)...
http://i.imgur.com/FxZXPxw.png)...
http://i.imgur.com/vnEgp6W.png)...
http://i.imgur.com/lJrIWsM.png)...
http://i.imgur.com/Otc7s8m.png)...
(http://i.imgur.com/cOcA9Wk.png)
http://i.imgur.com/eopSkBc.png)...
http://i.imgur.com/0y2lN7r.png)...
(http://i.imgur.com/t0vNGvj.png)
2/8修改
2.5
(http://i.imgur.com/yTkB96w.png)
1/30
http://i.imgur.com/yZUsHBY.png)...
http://i.imgur.com/GU6uOTG.png)...
(http://i.imgur.com/V055xch.png)
(http://i.imgur.com/Vj3Vtc6.png)
(http://i.imgur.com/yb8MpxE.png)
(http://i.imgur.com/fJJIc5U.png)
11*23
(http://i.imgur.com/2scJyBh.png)
(http://i.imgur.com/350wqkS.png)
(http://i.imgur.com/lTagVFY.png)
1。
(http://i.imgur.com/KtedSUG.png)
2。
(http://i.imgur.com/58KB5rG.png)
證明。
(http://i.imgur.com/Xu2FoZa.png)
(http://i.imgur.com/SHPSGCT.png)
(http://i.imgur.com/20Eh2ou.png)
(http://i.imgur.com/CYqlJtQ.png)
10/27
(http://i.imgur.com/pYAiRNL.png)
(http://i.imgur.com/7XWJAs7.png)
(http://i.imgur.com/sNYlrdf.png)
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