已知平面向量
满足
,
,且
的最小值
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a838d9d01d18ed8cfb34d302cd74c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243d8dd0745f475770e3a8de0a496696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4a5e3cb5a570878390165ff7c60fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17f1a5e23d26a826fb62e179a8feebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ad31d72da87acd78b48c80551569a5.png)
A.![]() | B.1 | C.2 | D.1或2 |
18-19高一下·浙江·期中 查看更多[2]
更新时间:2020-03-09 17:08:39
|
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单选题
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较难
(0.4)
名校
解题方法
【推荐1】已知圆
的半径为3,
是圆
的一条直径,
为圆上动点,且
,点
在线段
上,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知直线
分别于半径为1的圆O相切于点
若点
在圆O的内部(不包括边界),则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4327ce0be7d027bcd8fb498cf1e32546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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(0.4)
【推荐3】已知点O为△ABC内一点,∠AOB=120°,OA=1,OB=2,过O作OD垂直AB于点D,点E为线段OD的中点,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1edff91949fe360b15e245964aaa418.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较难
(0.4)
解题方法
【推荐1】已知平面向量
,
,
,
,若
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b28baf17059c56ee9ad1ae4814acd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b04618e5b2db68f2de6ba68972c505c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9baa0ebaa09fa152fa7031f324ede4c2.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
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【推荐2】如图,在
中,
,
,点
为边
上的一动点,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/2020/10/25/2578660472750080/2580523294892032/STEM/410a37f5-ab36-4747-b129-62fff5a48061.png?resizew=237)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6a988eb97aa0460e1a96cc99b166b1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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A.0 | B.![]() | C.![]() | D.![]() |
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【推荐3】已知向量
的夹角为60°,
,若对任意的
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
,且
,
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3391576038a1782ce7283ddb46e6ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ebb11e580d4157e7944fb9fe5d80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379642e562ad41e037b220d4b6c3dd9f.png)
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您最近一年使用:0次
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【推荐1】若平面向量
,
,
满足
,
,
,且
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
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解题方法
【推荐2】
中,
,
,
是
外接圆圆心,是
的最大值为( )
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