2023·全国·模拟预测
解题方法
1 . 已知不等式组
表示的平面区域为D,若直线
经过区域D,则实数k的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d3c2ab4182f66c4cda8fffe32b92b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
A.![]() | B.![]() | C.1 | D.2 |
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2 . 已知向量
,
,且
,若
,
满足不等式
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82d193d356e3ba53e05b89645a01c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97486ff674007bb1f0afaeff15e99b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](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/4edf2e906d4bbfdb6d02e13597236ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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