1 . 已知点
.则向量
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4405ddbf5ca287ecb1d94b55b5e81868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6eab0544c9fad5acde25bec349fb02.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知空间三点
,
,
.
(1)求
,
;
(2)是否存在实数
,
,使得
成立,若存在,求
,
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee141f4ee500454aa34cf9c66e90f29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866aa11c73d426cc2efef37aebb39f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd0e3fb39a5261e0b7bcebebfb41f9d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e88bca29b1406f27f1913b7f25fb483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18acebeae8cc30bd05d6dfd5f0f2e737.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2fc5968a31950749c79e87c1265eaed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
名校
3 . 在空间直角坐标系中,已知
,
,
,
,则直线
与
的位置关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a746c2759c06fd94b167fe63a22e64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e813191e1efb1505ddc85f065f9007a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2190e5a0c640a2d175885a01894059a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221b4c5208d5babb735b6c69aee62106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.异面 | B.平行 | C.垂直 | D.相交但不垂直 |
您最近一年使用:0次