1 . 已知S是全体复数集
的一个非空子集,如果
,总有
,则称S是数环.设
是数环,如果①
内含有一个非零复数;②
且
,有
,则称
是数域.由定义知有理数集
是数域.
(1)求元素个数最小的数环
;
(2)证明:记
,证明:
是数域;
(3)若
是数域,判断
是否是数域,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9862bd95f5984d277bffec774aaf04eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4034552829008c1daaee2701d2afe8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add287d65098cf6afc04da8d55c8e2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb0cbda87a5e26ceb063d749533eb58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c412d5329ba909164329663b7eecdfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c4892e431f6bd8f9dfb7b593653b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ecb1589c3cc179e2f62507020771e.png)
(1)求元素个数最小的数环
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4defd79134fced9d2beaba395d4994dd.png)
(2)证明:记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b23f5d67f2aed1d240a62c192fe97f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca8142445fb86f9404c814a8067db48.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfa8cb6d43bc7fbec75c27b6285fff.png)
您最近一年使用:0次
名校
解题方法
2 . 记集合
,集合
,若
,则称直线
为函数
在
上的“最佳上界线”;若
,则称直线
为函数
在
上的“最佳下界线”.
(1)已知函数
,
.若
,求
的值;
(2)已知
.
(ⅰ)证明:直线
是曲线
的一条切线的充要条件是直线
是函数
在
上的“最佳下界线”;
(ⅱ)若
,直接写出集合
中元素的个数(无需证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8ed79e83f9896873e80c3c4b5a935d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bf53ee2722352957ab61f90a49daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54ade3f669537d031a2be1b4f24a626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f4d45f004ca5fbf9a9bb4f0eef8232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165beb63772ec0f7797a71646d0a1ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f4d45f004ca5fbf9a9bb4f0eef8232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7cc26a0fe4103db9229df034d5aa70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf2f55da363aa19912ee465d3eb2737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063bb2a5c220db357fa36417de213ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da66a74e8ab43f08d4b3949bb7d24e4.png)
(ⅰ)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f4d45f004ca5fbf9a9bb4f0eef8232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2faa63899873813748f6a28b8a92e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f4d45f004ca5fbf9a9bb4f0eef8232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac87434324956e4145e38ad92a1aa95.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a669064772daefdeb12c3ebaf01a581f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a494f5a36475e96c7bc69589f70c3a86.png)
您最近一年使用:0次
2024-05-07更新
|
477次组卷
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2卷引用:安徽省安庆市第一中学2024届高三下学期6月第四次模拟(热身考试)数学试卷