1 . 若x、y满足|y|≤2-x,且x≥-1,则2x+y的最小值为
A.![]() | B.![]() | C.1 | D.4 |
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2 . 将1,2,3,……,9这9个数全部填入如图所示的3×3方格内,每个格内填一个数,则使得每行中的数从左至右递增,每列中的数从上至下递减的不同填法共有种
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/18db883c-eec0-4111-91d7-0fe1b38a33c2.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/18db883c-eec0-4111-91d7-0fe1b38a33c2.png?resizew=148)
A.12 | B.24 | C.42 | D.48 |
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3 . 集合A={2,0,1,3},集合B={x|-x∈A,2-x2∉A},则集合B中所有元素的和为
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 若复数z满足
且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882bff376e1d71865bd23b747ef78a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae53a4b5ae5f0288d4d1ed6b41a7b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57807eadc47ea5cd8a943ccdb3c1c14d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882bff376e1d71865bd23b747ef78a66.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知
,
,…,
是一列互不相等的正整数.若任意改变这
个数的顺序,并记为
,
,…,
.则数
的值必为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94596e2d955050a7b56052d6efdc422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37eae8a3cf8ef8a44162c82a7229a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54918ce4ab3aac559edb12a8d6a76220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02557fa67235bb6fb87769dbc9d2330f.png)
A.![]() | B.![]() | C.奇数 | D.偶数 |
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6 . 设函数
满足
,且当
时,
,函数
则函数
在区间
内零点的个数为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a5473402bf857ed42f4084e7e6f0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e298fe246eef819dd9b1edabe3bb9cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08869ffa8b997472fbc4deee60ae0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff65953311c700ffe160fb0d8a1afc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29974448aa1365da19c0c7c47757cc1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c241192bd1111e379945833c01f70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/935daf9a9c4a0f5c76e2a6079806a8b7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2011高三·吉林·竞赛
7 . 设集合
,
.则
与
的关系是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bad143c5e0feaa7d1eaa17879cadc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7aba85e8c6c2c446ab49349bc0c9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
A.![]() | B.![]() | C.![]() | D.以上都不对 |
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8 . 数列
满足
,
,记
.若
对任意的
恒成立,则正整数
的最小值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fff17237827b52c348041ea4215403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61982eac11e87e814ea6b5df6e389a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98972abd577ef5e20fc5545d3ec6e7be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df37d45d84dcc1fa4d42cf209b935eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.10 | B.9 | C.8 | D.7 |
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2009高三·吉林·竞赛
9 . 现有一个正四面体与一个正四棱锥,它们的所有棱长都相等.将它们重叠一个侧面后,所得的几何体是( ).
A.四面体 | B.五面体 | C.六面体 | D.七面体 |
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