=1/50*(1/50+1/49+....+1/2+1/1)
回複:世界大學生奧賽題:坐飛機(2.5星)
所有跟帖:
• correction -jjmmjj- ♂ (56 bytes) () 07/09/2009 postreply 18:55:19
• (49/50 + 1/50/50) * (48/49 + 1/49/49) ....*(1/2 + 1/2/2) -jjmmjj- ♂ (0 bytes) () 07/09/2009 postreply 18:57:05
=1/50*(1/50+1/49+....+1/2+1/1)
• correction -jjmmjj- ♂ (56 bytes) () 07/09/2009 postreply 18:55:19
• (49/50 + 1/50/50) * (48/49 + 1/49/49) ....*(1/2 + 1/2/2) -jjmmjj- ♂ (0 bytes) () 07/09/2009 postreply 18:57:05
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