某些立几问题,若用几何方法直接求解,往往不易求得:例如,求异面直线的距离问题,能正确作出其公垂线是一个难点.若利用代数中的“函数极值法”来求解,有时会十分简捷明晰,化难为易.今年高考理科试题第18题便是一个典型试题.下面再举数题,供大家参考,慢慢体 Some vertical problems, if solved directly by geometric methods, are often not easy to obtain: For example, to find the distance between straight lines of different sides, it is a difficult point to correctly make a vertical line. If you use the “extreme function method” of algebra To solve, sometimes very simple and clear, difficult to change. This year’s college entrance examination science question 18 is a typical test. The following questions, for your reference, slowly