作业帮设X,Y满足条件x-y+2>=0,x+y-4>=0,2x-y-5
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设X,Y满足条件x-y+2>=0,x+y-4>=0,2x-y-5
设X,Y满足条件x-y+2>=0,x+y-4>=0,2x-y-5
设X,Y满足条件x-y+2>=0,x+y-4>=0,2x-y-5
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这是一道线性规划题,需要借助图像
还有一种方法就是：最值点在端点处,你把三条直线的三个交点求出来,代入目标函数,最大的就是最大值 最小的就是最小值
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