若
满足
,则下列不等式恒成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3a495508245786beb7667365ffd231.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-03-04 11:12:22
|
【知识点】 画(判断)不等式(组)表示的可行域解读
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适中
(0.65)
名校
【推荐1】实数
满足约束条件
且目标函数
的最小值是
,最大值是
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐2】设
满足约束条件
,若目标函数
(
)的最大值为2,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d03d44eafba9623610f6aaa6904d98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f992bb01c2ec23384c6ae6432a64a5.png)
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A.2 | B.![]() | C.4 | D.![]() |
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