论文部分内容阅读
全日制普通高级中学教科书 (必修 )《数学》第二册 (上 )P6 0 ,2线性规划问题 .设Z =2x+y ,式中x ,y是满足下列条件x- 4y≤- 33x + 5y≤ 2 5 ①x≥ 1求z的最大值和最小值 .对于上述问题 ,教科书的解法是 :先画出不等式组①的图象 .得到可行域 ,再作直线l0 :
Full-time ordinary senior high school textbooks (compulsory) “Mathematics” Volume II (on) P6 0, 2 linear programming problems. Let Z = 2x + y, where x, y is the following conditions x- 4y ≤ -33x +5 y ≤ 2 5 ①x ≥ 1 find the maximum and minimum value of z.For the above problem, the textbook solution is: First draw the inequality group ① image obtained feasible area, and then make a straight line l0: