1 . 如图,在
中,
为钝角,
,
,
.过点
作
的垂线,交
于点
,
为
延长线上一点,连接
,若
.
的长;
(2)证明:
;
(3)设
,
,是否存在实数
,使得
恒成立?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4feca46892420550b89640eeb6efa4bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5f3e6682ff3bbb22f5f837468c5e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3719cea07e8f138a4d7818536712282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61054f941aa4f57e9f92bd510d2bdd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dddd64d22de704d8cdefccc521ecd7.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b34e72825d8122b50e52c3a08f35a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c58d500e2ec5ae5f62c3b5f28348c62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200fc2c6a285ba2b4322ace4ed0a9758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
22-23高三·河北·阶段练习
名校
解题方法
2 . 在锐角
中,
均为已知常数),.
的外接圆,内切圆半径分别为
.
(1)求
;
(2)点
分别在线段
上,
的周长为
,请证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b39ec72f31e276913731fe528ea501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4c5cf91626c9466cb419c9f05b635e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ccc856c1ae94972c6699b3952f92c72.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee14312eec42c729aab9880e09d3726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddf27f1db96592cdf0eef5d9481a759.png)
您最近一年使用:0次
2023-02-06更新
|
1100次组卷
|
3卷引用:重庆市第一中学校2022-2023学年高一下学期4月月考数学试题