设
,
,
,且
,
,
.
(1)证明:
;
(2)证明:
.
![](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/686b332872c51b433befe65fbe773380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a60f8629b77d6afcbdbb7969d6917bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56667aabbe787eb1c3189d487d203e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45d94114371be4fbe2358a8e69365db.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09db8e463b4aeeb38860ec85ff391e05.png)
更新时间:2021-11-05 13:31:36
|
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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】已知直线
:
,圆
:
.
(1)判断直线
与圆的位置关系,并证明你的结论;
(2)直线
过直线
的定点且
,若
与圆
交与
两点,
与圆
交与
两点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfc025cd9862619119d0e17aa9bcdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6945a4efccb2f202b29e628caf887154.png)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfac06e719312bc1bce84992704c1bca.png)
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解答题-证明题
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解题方法
【推荐2】已知
均为正实数.
(1)求证:
,
(2)若一个直角
的两条直角边分别为
,斜边
,求直角
周长
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb2e31608320e989afeeed9a7a8482d.png)
(2)若一个直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解答题-应用题
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名校
【推荐3】新冠疫情造成医用防护服短缺,政府决定为生产防护服的公司提供
(万元)的专项补贴用于扩大生产,并以每套80元的价格收购其生产的全部防护服,公司在收到政府
(万元)补贴后,防护服产量将增加到
(万件),其中
为工人的复工率.公司生产
万件防护服还需投入成本
(万元).
(1)将公司生产防护服的利润
(万元)表示为补贴
(万元)的函数(政府补贴
万元计入公司收入);
(2)当复工率
时,政府补贴多少万元才能使公司的防护服利润达到最大?
(3)对任意的
(万元),当复工率
达到多少时,公司才能不亏损?(精确到0.01).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e02898073785f0bd8885cfd37f0f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891044007e159bf030750aa1ce95c7af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ee36f89e40e343cb50fa9c1008e363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0481ccd99308ed449111ed639361db3.png)
(1)将公司生产防护服的利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当复工率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c24afec8107ae1f99fcab1116fd6252.png)
(3)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de1ce3181f3b4122b3a746c0085338e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】(1)已知
,用比较法证明:
;
(2)已知
,用基本不等式证明:
,并注明等号成立条件;
(3)已知
,用反证法证明:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2128a00f52af4427721f0ebba591daa.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d66530037e9ad08b11dfe515571f41.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937559aeec06323cde8861b17024fc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be100015cff38b6dfba5080fa94d128.png)
您最近一年使用:0次