解题方法
1 . 下列函数中最小值为2的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 命题“
”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9496d501f653747c9160330b45840a6.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
3 . 设
,则“
且
”是“
”的( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e42953357fe79c16248ef4c79e6089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d8b93ecbaab8a7a4899a042399f5fb.png)
A.充分不必要条件 | B.必要不充分条件 | C.充要条件 | D.既不充分也不必要条件 |
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4 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabbd0205ffb925a495628d87eca6dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753d846b8faa761d4ac6b2caeb231a80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 若
对任意
恒成立,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e444cb797000ea1f11aa205699c3ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ab4b75fa22deba7fcbcdcb31dd45b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249a976e88133f3b3733f09137cf5c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03064a89515f91d3541de52dcb2ca343.png)
A.189 | B.190 | C.464 | D.465 |
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6 . 已知全集
,集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9a9779c1aa971c463447e664aacda8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b94718332fd5045890c741ba9147694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7a4fe24c85649255721bd5a9b37ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67070a68185686687076d9b73c49a441.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 .
的相反数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9aca6dc1eab78ab15c0b9ba5f076026.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 函数
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1eb5951569be7d5783c078cf019a94.png)
A.8 | B.9 | C.10 | D.11 |
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9 .
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ee2cb94f866b0799e9021aa2e5704.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
10 . 若集合
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d3e02e16791da481b11926e3bca9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d416f4cd8b7ced1a77c92d1d4b252ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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