假设某小区的道路组成了一个 4 × 3 的网格结构(每条路就是一条横向或纵向排列的线段),小明住在网格左下角的 m 处,他想到达. 在 数学 中, 拓扑空间 x 中一条 道路 (path)是从 单位区间 i = [0,1] 到 x 的一个 连续函数 f. 道路的起点是 f (0),终点是 f (1)。 通常.

Emotional Rollercoaster A rollercoaster track with various emotional

问题一: 在直线 l 上求一点 p,使得 pa + pb 值最小.

作法: 连接 ab,与直线 l 的交点即为 p 点.

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