41/48...（2/3）＾3*4＝32/81?the same as I did first time

來源: jinjing 於 2010-08-01 09:13:00 [] [舊帖] [給我悄悄話] 閱讀數 : (57 bytes)

[(11/16)*(16/81)+(15/16)*(32/81)]/[(16/81)+(32/81)]=41/48

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