2012·浙江绍兴·一模
解题方法
1 . 已知向量
,
,
满足
,
,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c8b29d70b3bc87623b4507ea589deb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02d71f47af53ef8ab9501c44751dfe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab432c05aa7a81b1e95a072cb1febabe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 设向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f13f5758455364f1e7999397d034550.png)
(1)若
与
垂直,求
的值.
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f13f5758455364f1e7999397d034550.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc9b91fb8d355f0aa521e0e45a63407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32024fbbcd5313513029e62ee90c04ff.png)
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2016-12-01更新
|
1367次组卷
|
7卷引用:2016届河北省衡水中学高三上学期三调考试文科数学试卷
3 . 已知向量
,
,若
,则
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1400a433b4391fdfe9803bab3beb90af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e199e3f79d9d3d692a3147e853ca32f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eaf38dfa804c090ddbc6539d419cb83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2010·河北石家庄·二模
4 . 已知向量
,
.
(Ⅰ)若
,求
的值;
(Ⅱ)设
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0b55e937d170ca3b920a07268587df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba5bd5b83c9be8ba3f92e771bbf3028.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f414a98d7c3fce03f4a63a862c0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e082bfaf56ab4d8afe94d07719e8f3.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a8a53cc792528e174a87847ef76ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccab792f36f174a68acb81599ae429b2.png)
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