名校
1 . 已知函数
.
(1)讨论函数
的单调性;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea1a650ffa47f1f85c45a13acf50c9c.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76ee2d48fe9913fbd8d957b572dc48a.png)
您最近一年使用:0次
2019-08-02更新
|
1397次组卷
|
2卷引用:黑龙江省鹤岗市第一中学2019-2020学年高三上学期10月月考数学(理)试题
2 . 如图,已知
是
的外接圆,AB=BC,AD是BC边上的高,AE是
的直径.
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/50c3e0070b13459e883842f9cf513f57.png)
(1)求证:
;
(2)过点C作
的切线交BA的延长线于点F,若AF=4,CF=6,求AC的长.
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/8ab2ae51d7c84c7f98fd027a2c02eb9b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/7fb14140b7684ef190294171f8650ae5.png)
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/8ab2ae51d7c84c7f98fd027a2c02eb9b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/50c3e0070b13459e883842f9cf513f57.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/0bba7a92d47346738d69885b23e69e35.png)
(2)过点C作
![](https://img.xkw.com/dksih/QBM/2016/2/22/1572489983975424/1572489989963776/STEM/8ab2ae51d7c84c7f98fd027a2c02eb9b.png)
您最近一年使用:0次