1 . 设数集
满足下列两个条件:
(1)
,
;(2)
或
,则
.
现给出如下论断:
①
中必有一个为
;②
中必有一个为
;
③若
且
,则
;④存在互不相等的
,使得
.
其中正确论断的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb2d47adc0c91dad269b8cd26c65379.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7713fd0e67f11fa4c18069224c7cc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f121689ff20f92685be3581e0118aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fde54c2f5832053e02309058e45c840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11a069688e4c797fcf527eab15afa82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce72e4fd04184e4df06ec90937a9a76.png)
现给出如下论断:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dca91a8345141bf4ff54da38ac85608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dca91a8345141bf4ff54da38ac85608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8647b00cc8c8f35555c7d78cf2812c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377a2333ff8c63cbdb20b882d6d5a7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c8b2714e2f6ddfdd6b05d3b4de1149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c122bf0489bd50fdacfa76ced475f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c509b1e861141815ba06dd3354f8108c.png)
其中正确论断的个数是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
2 . (1)设
为虚数单位,求
的实部;
(2)计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18abfd9441f24a5fbd1b7e7d5cd1aab.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e71d0503b3feda569aeeb1036876d9c.png)
您最近一年使用:0次
2021-01-26更新
|
776次组卷
|
2卷引用:江苏省扬州中学2020-2021学年高一(早培)下学期期中数学试题