已知
,若
恒成立,则
的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea142d143e285bfa288a0a236ddd355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331cfd9e4316b2cb6e9cc7d144f29724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9faeed172ec5b88966b0d1c52748d41.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2018-02-22 14:26:02
|
【知识点】 根据线性规划求最值或范围解读
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单选题
|
较易
(0.85)
解题方法
【推荐1】已知实数x,y满足约束条件
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e30687fcc6d48e4a13eb389f722a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf65a006c5b9fee73f21acb20ac7b41e.png)
A.14 | B.16 | C.31 | D.32 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】已知点
的坐标
满足不等式
,
为直线
上任一点,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee0c2ab1739b11bbca35a417f37213e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9427de5d22d37859a110dbb234313c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac35b1e8a952aac4f4cdaaf02d868d04.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次