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含参变量的线性规划问题是近年来高考命题的趋势之一。这种命题方式提高了思维的技巧,增加了解题的难度。下面我们结合例题,谈谈线性规划问题中设置参变量的特点,以及求解这类问题的基本方法。一、条件中的参变量由于条件不等式组中含有参变量,所以不能确定可行域的形状,因此,增加了解题时画图分析的难度。求解这类问题时要有全局观念,结合目标函数逆向分析题意,整体把握解题的方向。
The linear programming problem with parametric variables is one of the trends of college entrance examination in recent years. This proposition way to improve the skills of thinking, increasing the difficulty of solving problems. Below we combine examples to talk about the characteristics of linear programming problems set parameters, and the basic method to solve such problems. First, the conditions of the variables Because of the inequality group contains parametric variables, it can not determine the shape of the feasible region, thus increasing the difficulty of solving the problem of drawing analysis. When solving such problems, we should have the overall concept, combined with the reverse analysis of the objective function of the problem, the overall grasp the direction of problem solving.