设向量
,
不共线,
,
,
,若
,
,
三点共线,则实数
的值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c449da09755bcd72cb64f89747f3dd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a587159eae84ff770cc8fa9734e5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3c195458907311aee69bc9eb0622bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f9df3dfe63c6907992e9b9ac670805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f29196cb56c88e571c9a80b7211cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9faeed172ec5b88966b0d1c52748d41.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
更新时间:2018-07-02 17:31:56
|
【知识点】 已知向量共线(平行)求参数解读
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【推荐1】设
为坐标原点),若
三点共线,则
的最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340b7fe1b2002a7a7fbda4647ee39b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3470f8e8142a61cfd3d4aa1e1e203d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd0e2c2932bd0292c4e2e5627c7496b.png)
A.4 | B.![]() | C.8 | D.9 |
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