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题目 设 n≥ 2为正整数 ,开始时 ,在一条直线上有 n只跳蚤 ,且它们不全在同一点 ,对任意给定的一个正实数 λ,可以定义如下的移动 :( 1 )任意选取两只跳蚤 ,设它们分别位于点 A和 B,且 A位于 B的左边 .( 2 )位于 A点的跳蚤跳到点 B右边的点C,且 BCAB=λ.要使跳蚤跳得任意远 ,
The title sets n ≥ 2 as a positive integer. At the beginning, there are n fleas on a straight line, and they are not all at the same point. For any given positive real number λ, you can define the following movement: (1) Choose two randomly Fleas, set them to points A and B, respectively, and A to the left of B. (2) The fleas at point A jump to point C to the right of point B, and BCAB=λ. To make the fleas jump arbitrarily,