如图所示,公路
一侧有一块空地
,其中
,市政府拟在中间开挖一个人工湖
,其中
都在边
上(
不与
重合,
在
之间),且
.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958743111925760/2960180743790592/STEM/3a6ccadb-fd14-4479-a6e5-721b3d425a34.png?resizew=251)
(1)若
在距离A点
处,求
和
的长度;
(2)为节省投入资金,人工湖
的面积尽可能小,设
,试确定
的值,使
的面积最小,并求出最小面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f643e4aaa1719086a91d781d90563d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898db7807a160f0c7b17e68615699a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c3fe26b378cb2665c06c5d8039d675.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958743111925760/2960180743790592/STEM/3a6ccadb-fd14-4479-a6e5-721b3d425a34.png?resizew=251)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bd4f1b3a3f3e534c5c3b39266f1ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb4fddc8045e815ffa58cff4bed74d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
更新时间:2022-04-17 16:46:03
|
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【推荐2】已知
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(1)求函数
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【推荐3】已知函数
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(1)求
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(2)若
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解答题-证明题
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适中
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【推荐2】已知
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fcd197570a810c014cf1bbba51ff927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
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【推荐1】在锐角
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
(Ⅰ)求角
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【推荐2】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1016c221b13009494d5d6cc0887eb0e2.png)
(1)求角B:
(2)从①
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7518ae70b44cd1f7ec68b12683304cc5.png)
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】设函数
,其中向量
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(1)求
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(1)求
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(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c845014ed84343c0977c96b57a2413ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】已知
的内角
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,
的对边分别为
,
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(1)求
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b29179321dd0c063eee5d7c451b6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44bdeb339d3e96819bf4c9afbbb9959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f6a559ef38f962fec35d98f5f370ff.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2d3c6d20ec680b233344a0be893ef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次