1 . 已知向量
(1,2),
(1,1),若
与
的夹角为直角,则实数λ=_____ ,若
与
的夹角为锐角,则实数λ的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3c0d82cbb443d84763b9b1d3f88f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c5684ccff633c427608fb5599ba1b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2859333183a1d5749eac25f8b4e3b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71f76b239380c437f998a14ea7d4b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2859333183a1d5749eac25f8b4e3b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71f76b239380c437f998a14ea7d4b59.png)
您最近一年使用:0次
2 . 设
且
与
的夹角为锐角,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e80d4942743ed691fdca493aa505bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afae9db82464afb37d387f6cbedc8139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2016-12-01更新
|
371次组卷
|
3卷引用:2014-2015学年甘肃省高台县第一中学高一下学期期末考试数学试卷