1 . 设全集
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6542d015e7069847b70860ab43b62572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c96443d13d44c98562a0076fa68d37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715476727accc3c6b3c71f2f25c3aaad.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知函数
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d0a191ad038b6fc08d08311048d228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb04d514baf56eec084671b88898770b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98cf78bc7435d06dd8a9112c5c8a178b.png)
您最近一年使用:0次
3 . 内蒙古某地引进了先进的污水、雨水过滤系统.已知过滤过程中废水的污染物浓度N(单位:mg/L)与时长t(单位:h)的关系为
(
为最初污染物浓度).如果前2h消除了20%的污染物,那么污染物消除至最初的51.2%还需要( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502eaabe8c0ab9569976da8205fa94d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
A.3h | B.4h | C.5h | D.6h |
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4 . 设集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738a7c89b55b5c5aed4f31b5ce834134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b40d8dd0aec53090a5b73fca9ad54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 设集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb6e54c66b907aa593756809c8961fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087844a2c4ac898ab717ef2b7ad5ba14.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
6 . 若函数
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150583385e069735493bfe52da78711a.png)
A.定义域为![]() | B.值域为![]() |
C.图象过定点![]() | D.在定义域上单调递增 |
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7 . 已知函数
(
表示不超过
的最大整数),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45987157289348c4a401551ffd7cb820.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6b1826b8eadc1e9361d2f989545df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45987157289348c4a401551ffd7cb820.png)
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解题方法
8 . 函数
的定义域是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a45165bad781d07e689e2931976ef2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
9 . 已知函数
的定义域为
,且
,则下列选项不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c607aaf014fdd9d18affe116af1964.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
10 . 若集合
,集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4fa7f541be676dee0b2f9ec7ad965db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3bf0614b43fee0292fbf3fd3496d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次