名校
1 . 设x,y满足约束条件
则
的最大值与最小值的比值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ee6300ce5e00fa42c51687ebee3c2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75407f5349719aba26f58213459793eb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-08-17更新
|
571次组卷
|
6卷引用:湖南省长沙市长郡中学2018-2019学年高二下学期期中数学试题
名校
2 . 设实数
满足条件
,则目标函数
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d9a84098fff3c3f0969fbd0402fc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8021e4350377a7f403b95566651f0c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-07-09更新
|
766次组卷
|
2卷引用:2020届湖南省长沙市雅礼中学高三上学期第2次月考数学(理)试题
3 . 已知实数
,
满足约束条件
,则
的最小值为
![](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/fce15de3bf3eeff769daf1ae124217cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb454770d690747053f52d5133fb5775.png)
A.![]() | B.![]() | C.5 | D.![]() |
您最近一年使用:0次
4 . 已知平面区域如图所示,
在平面区域内取得最大值的最优解有无数多个,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aed220bd-b1cc-4e9d-9b55-a8b343eb4e82.png?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2075f12a081313f6ae6feccb292078f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aed220bd-b1cc-4e9d-9b55-a8b343eb4e82.png?resizew=193)
A.![]() |
B.1 |
C.![]() |
D.不存在 |
您最近一年使用:0次
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5 . 已知实数
,
满足
,则
的取值范围是
![](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/9acd7a98a45b46fe03470243e11e7130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a125cb40ab3d54de9f3a444032af5e4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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6 . 已知实数
,
满足不等式组
,则
的取值范围是
![](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/c13cb73d88ac2441acfd87abef6e9819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6aa1de808b498b0edddac62126b9b8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-06-02更新
|
279次组卷
|
3卷引用:2019届湖南省湘潭市高三第三次模拟文科数学试题
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7 . 已知变量
满足约束条件
,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543e147d6e71b53c47d00277e607bead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be86135c2d33700e409da6c5951165e2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-05-20更新
|
524次组卷
|
2卷引用:湖南师范大学附属中学2018-2019学年高三下学期第六次月考数学(理)试题
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8 . 若x,y满足约束条件
,目标函数
仅在点(2,0)处取得最小值,则实数a的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53ab0fc453a992114bfcefd6aab421e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa79c2c101deb8595d3b296ad2b73d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-05-19更新
|
853次组卷
|
2卷引用:【全国百强校】湖师范大学附属中学2019届高三数学(文)试题
9 . 已知
,若
恒成立,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769204df7cd5dc5b18ffb198d1538af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24230aa9b8a037013ed31d0481aab39e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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10 . 若
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fafe1614aacaa4a19122bfec3343d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次