[問題] 一個數學問題
x1,x2,x3合力做一工程需花n個小時,x2和x3合力做此工程要花m個小時,若rate不變,
問x1單獨做需多久時間
請問這一題該怎麼算?
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In fearful day, in raging night,
With strong hearts full, our souls ignite,
When all seems lost in the War of Light,
Look to the stars-- For hope burns bright!
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推
09/02 03:16, , 1F
09/02 03:16, 1F
推
09/02 03:19, , 2F
09/02 03:19, 2F
推
09/02 09:01, , 3F
09/02 09:01, 3F
推
09/02 12:07, , 4F
09/02 12:07, 4F
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