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2 comment(s). Last comment by 爱丽丝 梦幻世界 2015-01-14 22:28

gbk5566

89 posts

Posted by gbk5566 > 2015-01-14 16:54 | Report Abuse

Goood !

Posted by 爱丽丝 梦幻世界 > 2015-01-14 22:28 | Report Abuse

more easy if we saving from 52,51,50...to 1. believe or not? first month need save up to201, but after that almost certain we can do it? result still the same S(n) = n(n+1)/2 =RM1378

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