Thank you so much three genius......

來源: xixiqian 於 2014-01-26 20:08:07 [] [舊帖] [給我悄悄話] 閱讀數 : (45 bytes)
回答: 求教二個數學題 由 xixiqian 於 2014-01-26 11:07:19

All your solution is very helpful, thank you!

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