名校
解题方法
1 . 在
中,点P为
所在平面内一点.
(1)若点P在边BC上,且
,用
,
表示
;
(2)若点P是
的重心.
①求证:
;
②若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)若点P在边BC上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac077c25a98e791e4a81b1c48c09015d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7239b3f2d88c2e45e17e5de9ae1a332.png)
(2)若点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699b82be749af3fa36f1fed5122591a9.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4aa4e839e8104005fe94eaf81f503e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3acf551f38311eccdcc325c0d283473.png)
您最近一年使用:0次
2023-07-05更新
|
417次组卷
|
5卷引用:四川省巴中市2022-2023学年高一下学期期末数学试题
名校
解题方法
2 . 如图,在四边形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4924cef4ea7427027aa6e1e6901f7df5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/9caa0e56-a9fd-4ac1-a70e-3bb650d6089a.png?resizew=181)
(1)证明
;
(2)设
,求
的最大值,并求
取得最大值时
的值为多少.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4924cef4ea7427027aa6e1e6901f7df5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/9caa0e56-a9fd-4ac1-a70e-3bb650d6089a.png?resizew=181)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40094378a6dbbf2071dabeae711a41a4.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d38ab3b6048946e6012099d0f2642d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1884dd7bea1b00c41563bc4abcd9d422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1884dd7bea1b00c41563bc4abcd9d422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2023-05-02更新
|
277次组卷
|
2卷引用:四川省宜宾市叙州区第二中学校2022-2023学年高一下学期期中数学试题