设向量
,
满足对任意
和
,均有
.则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ed0b283d1aa2cdb37269b46776b83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e787e08a026df20eb49afec8d4564a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd0f1e3e3b41948f1b3d287c4b0cb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52edc12dd7ec70c9949924f9099f2dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2018高三·全国·竞赛 查看更多[1]
更新时间:2018-12-20 23:14:32
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