(1)证明三点
共线;
(2)若向量
,当
与
垂直,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce51ff450fbfe7372d4118ad9560f993.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e71a0e10a103f31c2e668fa457e2795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7447872b1ead17d89c0947b601cd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2018-06-20 14:26:24
|
相似题推荐
解答题-问答题
|
容易
(0.94)
解题方法
【推荐1】已知
,
,判断
,
是否共线,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e3cb6d37b0f55999dc71a8a957ebcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb133a386a90c6c3e4fb685c84f1d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
您最近一年使用:0次
解答题-问答题
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容易
(0.94)
解题方法
【推荐2】设
,
为不共线的非零向量,判断下列各题中的
,
向量是否共线.
(1)
,
;
(2)
,
;
(3)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0453fa302453c627e2b821d5a9b711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555f349e7a9396d1837f3b610e2ca434.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd91c72dcd2c587033817dec88f6524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d36185d8d1559c1a0b394b7a044c64.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e156c75cf0bbc71732226e89931bb061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555f349e7a9396d1837f3b610e2ca434.png)
您最近一年使用:0次
解答题-问答题
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容易
(0.94)
解题方法
【推荐1】平面内给定三个向量
,
,
.
(1)求
的值;
(2)当实数
为何值时,
垂直?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8944a6e26f8ba30e5202ae409c7085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78663afd7852e2320d7eaa41010400b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6314eb8536a428479b5ac8cd733bb8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1140aee44fe391afe111814ea96c57ce.png)
(2)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12976a4d92584494d1c2c714684d45b1.png)
您最近一年使用:0次
解答题-问答题
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容易
(0.94)
名校
解题方法
【推荐2】已知向量
,
.
(1)求向量
与
夹角的余弦值;
(2)若向量
与
互相垂直,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5463fb0b7d03747aa4d680620ca81be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b1305dff4fc89f3e8bc75fa7c258de.png)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a33a75de170e49f55eb2b38cfa001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
解题方法
【推荐3】已知向量
.
(1)当
时,求向量
与
的夹角的余弦值;
(2)当
时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff773d0407b10cfbfdbcb9150cc892fd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317d63bb6100d710a119cadbc9676fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9667f6c0eac65be9c5e10f966af41f.png)
您最近一年使用:0次