如图,在
方格中,向量
,
,
的始点和终点均为小正方形的顶点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/26859690-354c-463c-9bda-44ed449696fd.png?resizew=118)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb9d60d456560e9bac66c8b20c49bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/26859690-354c-463c-9bda-44ed449696fd.png?resizew=118)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-07-08 20:43:07
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【推荐1】已知向量
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a666409aedd892336f57ccd93905d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1874ef4349c4a8ea8e5880b5468aa1d4.png)
A.若![]() ![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() |
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【推荐2】如图,在等腰直角三角形ABC中,设
,
,点D为BC上一点,且
,则下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/25/2986965697101824/2987580303441920/STEM/29c0ab14c59d487fa0d9bc5e970bb5ea.png?resizew=134)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b6bef27de230acad352f25e954f4e.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2986965697101824/2987580303441920/STEM/29c0ab14c59d487fa0d9bc5e970bb5ea.png?resizew=134)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐3】已知平面向量
,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c067e4548a847026cd22a6af11b25a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0979ead3a09ede4835e7fe77c87850f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d22a0d50465d1d420537ce001e0062f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐1】已知向量
,设
的夹角为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1716c0c265fbb7a0aa3b8016c789d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() |
您最近一年使用:0次
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(0.85)
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【推荐2】已知向量
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43fa9307f35580493bf435ac6a464b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a0af198dd7538d867c7fa1facdd06d.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次