x,y满足约束条件若z=y-ax取得最大值的最优解不唯一,则实数a的值为_____
更新时间:2016-12-13 11:02:39
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【知识点】 线性规划
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【推荐1】若变量
,
满足约束条件
且
的最大值为
,最小值为
,则
的值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe663c30a6e45f841f794330ad2b3c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f100b8d251c986e959895cd33374c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2416d1f75a45a314331146550832e.png)
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【推荐2】已知实数
,
满足不等式组
,则
的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18622e0a61540ba731ec46c0d45b3545.png)
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