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[(sh)WώM](sh)WώM

rg:2012-07-18 13:44 Դ:z236.cn :݋ c:

һw180׸̎ÿض߶ȵʮ֮һ
   Ո@һֱoֹǰď߶֮ [s:4]_hͣO޵˼·
   Ҕ(sh)Wȫ߀oώ˲W(sh)Ԓ@ҪЮI(y)yһoޔ(sh)йʽġ
   ώMһ
   
   ʾ@Ҕ(sh)Wώ҂
   
   һw180׸̎ÿض߶ȵʮ֮һ
   
   ȱȔ(sh)Ŀy20mÿض߀10/1
   
   @Ҕ(sh)Wώ] W܇һv܇,҂˃ɂŮ(sh)Wώλcһξٛ]@}Ŀϧ10ǰˣF(xin)ڲ19.9999999.....8ȱȔ(sh)е֪R
   
   Sn=n×a1 (q=1)
   Sn=a1(1-q^n)/(1-q) =(a1-an*q)/(1-q) (q≠1)180/(1-1/10)ǂoFȱȔ(sh)͆.. ӛdz߀Ǹ
   --------
   
   
   yһoޔ(sh)
   
   ĺԲӛ
   ЂŽY(ji) [s:4]̫ǿď߶֮ͣ
   ô20
   һε180ײ㣬ȱȔ(sh)͆h 헳1pȵȱȔ(sh)͡
   
   a1=18
   
   0.1
   
   
   @㶼
   
   19.9999999.....8
   
   㷨 [s:4]

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