约束条件下的运动直线问题是一类应用较为广泛又较为流行的数学问题,它与一些特定函数的最值(或值域)、线性规划的图解法、含参方程有解以及不等式恒成立问题都密切相关.在一般情况下,人们比较习惯用纯代数的方法解决这类问题,过程和步骤显得较为烦琐复杂.笔者最近对这类问题做 The motion line problem under constraint conditions is a widely used and popular mathematical problem. It is related to the most value (or value range) of some specific functions, the graphical method of linear programming, the solution of the parametric equation, and the inequality problem. All are closely related. Under normal circumstances, people are more accustomed to using pure algebraic methods to solve such problems, and the procedures and procedures are more complicated and complicated. I recently did this type of problem.