已知向量
,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_____________ 时,
与
方向相反.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa007d1a31f23db824a9db0112ff171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
20-21高一下·江苏宿迁·阶段练习 查看更多[2]
更新时间:2021-04-01 13:30:28
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【知识点】 由向量共线(平行)求参数解读
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较易
(0.85)
解题方法
【推荐1】已知向量
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487a853ccf14708bb997fbabd97ec318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d8b1889f7943a0593ff18d7cbed99a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b958a367fa2f08b6202a5a6ebf5e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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