若两空间向量
共线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21806406165de6d8a628a115b27d97d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4753f4a4456d0df13843b71015bfa14.png)
A.8 | B.2.5 | C.20 | D.10.5 |
更新时间:2020-10-03 11:13:30
|
【知识点】 由空间向量共线求参数或值
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【推荐1】已知
,
,若
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10a59869984a8cce2cba1524c9a9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcb4a264fc435e78f3cb16fbc573ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a876a619bc28982306a920e932a3749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.2 | C.![]() | D.1 |
您最近一年使用:0次
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(0.94)
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【推荐2】已知平面
的法向量为
,平面
的法向量为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a141198f9ce61815db849c0a955b78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1ecfbebba875c1d1ee6e2398450834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b303b1f07604f5303aea94df7f0518e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.-2 | B.-1 | C.1 | D.2 |
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