1 . 设数集
满足下列两个条件:(1)
;(2)
,若
则
. 则下论断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8518dab1e2a5525a4311a8cca1700cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56e6a5f7c06d61bc833ac4bcb61b89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac8c98b4e75cc7d3a018a9ec34ee522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11a069688e4c797fcf527eab15afa82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8551a883fdf0a472d21a5aff7b080005.png)
A.![]() |
B.a,b,c,d中必有一个为1 |
C.若![]() ![]() ![]() |
D.![]() ![]() |
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2023·河北·模拟预测
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解题方法
2 . 若复数
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0784ba9206d8a1c9b3c8191c9af6d0f7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3284ac12983830b8d7606a8dc5724b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497d68cdd1ae98ab32060ff5f83cf2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0784ba9206d8a1c9b3c8191c9af6d0f7.png)
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解题方法
3 . 下列命题中真命题有( )
A.已知![]() ![]() ![]() ![]() |
B.若定义域为R的函数f(x)是奇函数,函数f(x-1)为偶函数,则f(2)=0 |
C.复数z满足|z|2=z2 |
D.函数![]() |
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4 . 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.![]() |
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5 . (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
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776次组卷
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2卷引用:北京一零一中学2020-2021学年高二上学期期末考试数学试题