1 . 当
时,定义运算
:当
时,
;当
时,
;当
或
时,
;当
时,
;当
时,
.
(1)计算
;
(2)证明,“
或
”是“
”的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b8043346a0a80781b0d9a7c9cecd4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28f616b1f56991ee75caae3ac35208b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a05cb3647f1ad81e328f8379b51291b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6910a71dc1e164c35b110ad0d68e3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9e3cf30d7a15408ddd0697a1fcf3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4aa46e2bdec36770ee57fe67639ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4581917005539a0806619080496676e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85349216e2fbdaa860e9f81b3924af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987270ce2ca977277b0a3d13cb20a9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd09fb9482124fd35f19b86894648f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb01e9ee38d5b6ab84c19789cb5af195.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a26d77e8c7e6ffc9ea9b9ed6d813a1.png)
(2)证明,“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d05a5b738133c7204d1c8f90e30ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfc50db0551c95ea1c63550750db33b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ffb9194dead5975e453628f5bac1e7.png)
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2 . 已知
,不等式
恒成立,
,不等式
0,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9d8faa829a3315f2fb83510a277aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c44e21df858a82c2e8659edd2abbc17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06138fd0c9d38d76be06aa4ece993990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05c566431180359d8f0710869cf6116.png)
A.p的否定是:![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() |
D.q为假命题时,![]() |
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2022-10-12更新
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1025次组卷
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7卷引用:河北省承德市高新区第一中学2022-2023学年高一上学期期中数学试题
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解题方法
3 . 下列三个结论中,正确结论的序号是( )
(1)集合
是无限集;
(2)集合
,集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d772fea600da0375d7307ae0e38874.png)
(3)若全集为
,且
,
,则
是
的充分条件.
(1)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a1799746ae587938735aa84c978d58.png)
(2)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedcdbb2409f87e3fcd133c33d829e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2aad368753d68c0b19ad760c458ef1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d772fea600da0375d7307ae0e38874.png)
(3)若全集为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52b4f24969673c863b5aff4fb6751ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45020afb5156159ad42add5537797ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c38edfcbc6d0348a9fc75376f629909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e89cdfbe285d6eb3e170303eca7404.png)
A.(1)(2) | B.(1)(3) |
C.(2)(3) | D.(1)(2)(3) |
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4 . 若命题
:梯形是四边形,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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5 . 给出以下命题,其中真命题有( )
A.若函数![]() ![]() ![]() ![]() |
B.若“![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.函数![]() ![]() ![]() |
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6 . 命题
:“
,
”.命题
:“
,
”.下列结论判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd052411b58a00a9e79c7319ea09186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9cc03b30352813f3bda2020dbfd031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa581ddb56a4ee203e527cccff7c103.png)
A.![]() |
B.![]() |
C.![]() ![]() ![]() |
D.![]() |
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2022-11-27更新
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195次组卷
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4卷引用:河北省2023届高三上学期11月联考数学试题
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7 . “
”是“
”的______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87a9ef1f87936695fb681df932efd10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a141495f9abd68126822a2ae920aed.png)
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解题方法
8 . 以下说法正确的是( )
A.“![]() ![]() |
B.已知![]() |
C.![]() |
D.“x为无理数”是“![]() |
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9 . 下列命题正确的是( )
A.已知![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() 是“ ![]() |
C.已知![]() ![]() ![]() ![]() |
D.已知![]() ![]() |
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2022-10-17更新
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2卷引用:河北省石家庄市第二中学2022-2023学年高一上学期适应性考试数学试题
解题方法
10 . 若M、N是全集I的真子集,下面四个命题m,n,s,t是命题
充要条件的是( )
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ae953766e4f60b96ac925d1245493c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a912addd894c3f8972a0645d82d5eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ebafea667e07e830734f5f1603a056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b64b33b2d1bbd66c0dd29b6e90cc8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c02f422eba097770c72b655dbecb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ae953766e4f60b96ac925d1245493c.png)
A.m | B.n | C.s | D.t |
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2022-10-16更新
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278次组卷
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5卷引用:河北省沧州市部分学校2022-2023学年高一上学期第一次阶段测试数学试题
河北省沧州市部分学校2022-2023学年高一上学期第一次阶段测试数学试题河南省部分名校2022-2023学年上学期高一第一次阶段测试卷数学试题(已下线)1.4 充分条件与必要条件(5大题型)精讲-【题型分类归纳】(已下线)2.2 充分条件、必要条件、充要条件(5大题型)-【题型分类归纳】(苏教版2019必修第一册)河南省周口市鹿邑县第二高级中学校2023-2024学年高一上学期第一次月考数学试题