1 . 求下列各式的值:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08750c5c7a2c3a9f2aa9b540e005f52d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c393330e8239838883e73ecd99e79b83.png)
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2 . 计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a36ccc53e11930b4b22390945512f8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc51db4c3265b22bd5a450c08d3781e.png)
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3 . (1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee98c25b08cee803d2ccf26a3b03147.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52abdd2f7b340c41850507f861540955.png)
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2021-12-12更新
|
408次组卷
|
4卷引用:河南省商丘市部分学校大联考2021-2022学年高一上学期阶段性测试(二)数学试题
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解题方法
4 . (1)已知
,求
的值;
(2)已知
,
,试用a,b表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4397f065fe20ad600b87841ca08fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc61f65b154515a09943e73f29b3cd89.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a08a2a5540efcdb5a77aa4ea3049884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850df3e299d9b1ecbda7e3a59e2a255e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ee960d4d117fc51c2b111b2363b722.png)
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