已知平面向量
,对任意实数
都有
,
成立.若
,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0ac10c8c28343847f48b85d50e53d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1537734e43ec5e4e62582ff90a052efc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9883f16cdef5fb87fb9d6a9897d113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b22b3b20ba51699209936210f991aca.png)
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22-23高一下·江苏泰州·期中 查看更多[2]
更新时间:2023-04-21 15:27:13
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【推荐1】梯形
中,
,点
在线段
上,点
在线段
上,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c45fdcc97df73a2b6cb4dec2db6aad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942d13ec8ed63cf531a37d9872ca86bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
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【推荐2】正方形ABCD的边长为2,O是正方形ABCD的中心,过中心O的直线l与边AB交于点M,与边CD交于点N,P为平面内一点,且满足
,则
·
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c7da76e6ab31a053b56a480d61d27d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288480e3173dc701db480491598271c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da84226c9326d450ec9c09f5006c9435.png)
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解题方法
【推荐1】在
中,
,
是
的外心,
为
的中点,
,
是直线
上异于
、
的任意一点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d75f67ac92faf413da3cf4aeaab9e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc2357daa427e616c23ed9459e30afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be8265052a358bed3d1bab5a1df8dca.png)
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【推荐2】如图,正方形ABCD内接于圆
,M,N分别为边AB,BC的中点,已知点
,当正方形ABCD绕圆心O旋转时,
的取值范围是
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/6ac4fadf-c7ef-4bae-a61e-596e46155244.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b33328faae2d2d4921900e97424de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96499747e4aea990f4b878eea8d73ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825ad0e1039d6f4b977ca0ac8a369d1c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/6ac4fadf-c7ef-4bae-a61e-596e46155244.png?resizew=196)
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