下列式子中,不正确的为( )
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2019-11-23 12:39:20
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解题方法
【推荐2】已知
,
是平面内两个不共线的向量,
,
,
,且A,C,D三点共线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303c9b0b5f6dfc16043f8ed1f237c983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1076cf4164bdf562b867398d7c7d7f3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44dc3923f800ecee6ea694be7f4c9830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
A.![]() | B.2 | C.4 | D.![]() |
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【推荐1】如图,向量
,
,
的起点与终点均在正方形网格的格点上,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/31e26d4a-38c3-4df1-917b-95934f48c88e.png?resizew=191)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67c3ff62537f3b1ce8f49b607d274c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/31e26d4a-38c3-4df1-917b-95934f48c88e.png?resizew=191)
A.![]() | B.3 | C.1 | D.![]() |
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【推荐2】如图,
、
、
、
是平面上的任意四点,下列式子中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/fce778d2-3015-4678-a3df-347ccb598036.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/fce778d2-3015-4678-a3df-347ccb598036.png?resizew=141)
A.![]() | B.![]() |
C.![]() | D.![]() |
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