名校
1 . 下列说法中错误的个数是( )
(1)已知
,
,则
与
不能作为平面内所有向量的一组基底
(2)若
与
共线,则
在
方向上的投影数量为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a67b29711bb464e3c8baf3dcc64ac9.png)
(3)若两非零向量
,
满足
,则
与
的夹角是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(4)已知
,
且
与
夹角为锐角,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d7282d804f282fe04d37e2972b42e.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f94d2e7874dd3545b8f1b66de0dfee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fac9ea2645f37ffd44407d5c89b8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a67b29711bb464e3c8baf3dcc64ac9.png)
(3)若两非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da6715fcf9f94ab6ec41fdd32d00f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ca43808974777649a58258de1436d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779d3b960e7c55f1eb8182e21f16bd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e878a887d0653f8b66ee3d2ead86b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce0d4e7f1d27f8680e2d0b97437e205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d7282d804f282fe04d37e2972b42e.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2021-08-15更新
|
376次组卷
|
2卷引用:安徽省宿州市十三所重点中学2020-2021学年高一下学期期中数学试题