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解题方法
1 . 已知向量
,
,
.若
恒成立,则实数
的范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c737cfaf9538428aa51f1c3deb42d014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5b9af2c3d4abeba615fe01211c6150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71b51d4e02ac6e8ac9b0a3bc1c90e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4948bfc883feb487bbd152c4ded655d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-10-07更新
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702次组卷
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3卷引用:广西桂林市2022届高三10月教学质量检测数学(文)题