Description
一个小球，或者说所谓质点，从一个A点的位置开始，在只考虑重力作用下，沿怎样的一条路径下滑，可以以最短时间滑到比较低的一个B点位置？ 这就是所谓最速降线问题。最速降线问题直接导致一次历史上最为牛人云集的数学竞赛，参赛者有牛顿，莱布尼茨，伯努利兄弟等人。“河中取物”问题示意图 （请将“空气”视作陆地，“水”视作河流即可）：由半径为2的圆所生成的摆线示意图：
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