过
的重心O任作一直线分别交线段的AB,AC于点D,E,若
,
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929e92779817efbb35640d74bdb8a79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2fd37b5803baaff6c949c318f6587e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
更新时间:2023-04-17 13:20:54
|
【知识点】 已知向量共线(平行)求参数解读
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填空题-单空题
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较易
(0.85)
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解题方法
【推荐1】已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40c3bef47eca74c23c275cc0ea1839b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6208cbf9f9ca96d25ac39d654553764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43403d09cdf66046039eeb78f481d47c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】已知向量
,
,
.若向量
与向量
共线,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41c46212d6f61fca9ce215a477ea1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a91ee6df1c1082030142f5951092e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3eb64d7b169d9db65bc1e5f35909fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a737c2c10e2c0c15fcd9f53191d018c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
您最近一年使用:0次