某人在一環形公路上跑步... - 拼圖
By Daniel
at 2008-05-18T18:28
at 2008-05-18T18:28
Table of Contents
某人在一環形公路上練習跑步,共跑2圈,第一圈的速度是 x米/分鍾,
第二圈的速度是 y米/分鐘( x > y ),則平均1分鐘跑的路程是 __________
(A) x+y (B) xy (C) x+y (D) 2xy
_____ ______ _____ _____
2 x+y xy x+y
請問一下答案是哪一個?
還有我要 [過程 + 解析]
謝謝
--
第二圈的速度是 y米/分鐘( x > y ),則平均1分鐘跑的路程是 __________
(A) x+y (B) xy (C) x+y (D) 2xy
_____ ______ _____ _____
2 x+y xy x+y
請問一下答案是哪一個?
還有我要 [過程 + 解析]
謝謝
--
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