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

來源: 於 2010-08-01 09:13:00 [舊帖] [給我悄悄話] 本文已被閱讀：次

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