名校
1 . 设
,
,
,
.
(1)若
.求证:
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23241b8f108df2ebb858c6ab622db460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de8c22ce620754b9f9343a24538c63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635c56ef1f2682ecf4daa8510b266de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358095195388d7d2db515d917351e255.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca3c4f4fddffde87452df1f56805cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b6fc7e4e457a179af628d22d7b1dff.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c531b28dd7ab93b62ca294da8d286a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25479a15fab65f88a0a66931b3d5c2e.png)
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2020-07-22更新
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6卷引用:内蒙古阿拉善盟第一中学2020-2021学年高二上学期第二次段考理科数学试题