已知
在平面直角坐标系
中,其顶点
坐标分别为
,
,
.
(Ⅰ)若
,且
为第二象限角,求
的值;
(Ⅱ)若
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acf45a5f66394502b70bf1dd68ee40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff40cb415020fadf6160eb02390637c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed64cdb0ea6f066d672be6299e25c04d.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd8c13192ca45c16dad5d59b547220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f71b1446d36d87c4e3f99d5bdb66170.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7798aadf6444f15795216208e4e5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e09b30e8722b6ce66cafa08aa5bacc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939122ddbd0184f78522e2aedaf03cd0.png)
更新时间:2019-01-27 10:39:54
|
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适中
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【推荐1】已知函数
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解答题
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适中
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名校
【推荐2】已知二次函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882b660047bb6ded500cedba57958e00.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48042bc6f931bc79b03b6faf033547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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适中
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1c17a53981687048cb4906307f8b0b.png)
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适中
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解题方法
【推荐1】已知向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6d915a3019f08498f59037b342f421.png)
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适中
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名校
【推荐2】已知向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7a29ba23272cc231ae662d6775f33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184c6736108865aa9ba3680f3d50526a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9856ad2a8dd1b673ec2cfa9ee0a1eaff.png)
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