1 . 如图,
为以
为直径的
上一点,
和过点
的切线互相垂直,垂足为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/c0ae45c0-d186-4d03-bdb2-61d26c7695b3.png?resizew=162)
(1)求证:
平分
;
(2)过点
作线段
的垂线
,垂足为点
(尺规作图,保留作图痕迹,不写作法)
(3)若
,求垂线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/c0ae45c0-d186-4d03-bdb2-61d26c7695b3.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c715756dfc6d38d80aba6503ac107572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
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2 . 已知函数
,(其中
且
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/3ed75f4e-4040-49b5-bcbb-d6875d5f5830.png?resizew=216)
(Ⅰ)当
时,画出函数
的图象,并写出函数
的单调区间;
(Ⅱ)若
在区间
上的最小值为
,求
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61395b6ffc642ac8e89f4b73261bbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/3ed75f4e-4040-49b5-bcbb-d6875d5f5830.png?resizew=216)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a13b4190ac3d5feaee27a4c97b21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c33b69adc112831fa115b5dffdb616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b36da3b4cc0a0cc408ef324b04c9d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b36da3b4cc0a0cc408ef324b04c9d4.png)
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