在直角梯形ABCD中,
,
,
,
,P是线段AD上(包括端点)的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/c2f0dd4b-8671-4f2c-bd78-320ff6af7b48.png?resizew=125)
(Ⅰ)当
时,
(i)求
的值;
(ⅱ)若
,求
的值;
(Ⅱ)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/c2f0dd4b-8671-4f2c-bd78-320ff6af7b48.png?resizew=125)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0db5ae4554df7cc63cc8606639f212.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384966d3daa0fa6349fa004c60ccef10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3111d602c17d7d5f1b8ad9f162a2c22.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33d348db8e37700b834254be0896e2d.png)
更新时间:2020-02-14 00:17:53
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在
中,角
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,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ee59964f020fc52b5ba66a3f5fcc3c.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa790981d8cc0e3f100cc539002255c2.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】双曲线
:
的左顶点为
,右焦点为
,离心率
.
(1)设点
和点
到某一条渐近线的距离分别为
和
,求
的值.
(2)过点
且不与
轴重合的直线
交双曲线
于
,
两点,
①已知点
在第一象限,设直线
和直线
的倾斜角分别为
,
,若
,求
;
②求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0276541c12707b24d2f06ea3d976cf7.png)
(1)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3079cd2cfe2309f4ba356f8d77668c.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a6cd385e82baf7d61e2b593e659266.png)
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适中
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名校
【推荐1】已知向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6569e50f43b3d8645652ecc13b62066e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fea9bf6b20c583ae6e7c022e2e18996.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e76878f96b1916fbde964272ec5711.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
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解答题-问答题
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适中
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【推荐2】已知三点
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(Ⅰ)若
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