名校
解题方法
1 . 如图,点
在
的边
上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8898171153a8ceed22501505b50fbf37.png)
![](https://img.xkw.com/dksih/QBM/2020/6/16/2485955080552448/2486618156802048/STEM/16e25efe97db460abdfb1302499733a3.png?resizew=231)
(1)求
和
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8898171153a8ceed22501505b50fbf37.png)
![](https://img.xkw.com/dksih/QBM/2020/6/16/2485955080552448/2486618156802048/STEM/16e25efe97db460abdfb1302499733a3.png?resizew=231)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1e5b7b1d5b077dabafae425a08d765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
您最近一年使用:0次
2020-06-17更新
|
969次组卷
|
3卷引用:吉林省东北师范大学附属中学2020届高三第四次模拟考试数学(理)试题
名校
解题方法
2 . 已知
.
(1)求
的值;
(2)若
求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cc43cebc411a84e6eee8b97734105b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b98e291a677bfa49b8ab2c8291f7129.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52da77fd37ca1d89c86ffd9d39616b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1ba6b6ee00c4b2763cb3fa59caa69f.png)
您最近一年使用:0次
2020-03-20更新
|
368次组卷
|
2卷引用:吉林省长春市第八中学2022-2023学年高一上学期期末数学试题