1 . 已知集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629f5fc15f06110587748c896827d6e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336d38741aab2255a35c26612bbd7cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 若
,
,
,则下列正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e046954dfc8062f93b804589daf6786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51d907bd07185f17e20284e3507a08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d05f1bda98e1ddf3e6e399d7c3e0e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 某研发团队研究出了一种新型智能产品,经过调研发现该产品推出市场的时间
(单位:年)与市场占有率
可近似用函数
来描述,其中
,
是常数.已知该产品市场占有率为
时,需要1年;市场占有率为
时,需要1.5年,则市场占有率达到
时约需( )(
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b377314a93453fa4bcbcc05971fd7c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28555fa2f3a09261cb4e0305d390145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9fd62e62750b30638385031737f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a263874aa2031f847d06d6cef24aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5869279eabecd2e4e6d5e050d1928151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104a3766960bc374e90b08f51da3d6e0.png)
A.2.32年 | B.2.43年 | C.2.58年 | D.2.81年 |
您最近一年使用:0次
解题方法
4 . 设全集
,集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2053e9780762c8cd60f2f6515c797687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66c9899f71da6bcf68dad7d77b89396f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715476727accc3c6b3c71f2f25c3aaad.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
5 . 使得函数
为奇函数的实数对
的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082aa0e3aa0760b432cbf19c4d53ffab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
6 . 天文学中常用“星等”来衡量天空中星体的明亮程度,一个望远镜能看到的最暗的天体星等称为这个望远镜的“极限星等”.在一定条件下,望远镜的极限星等M与其口径D(即物镜的直径,单位:mm)近似满足关系式
,例如:
口径的望远镜的极限星等约为10.3.则
口径的望远镜的极限星等约为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/1eed6d60-daac-4f2e-9eaa-49782b9d9009.png?resizew=208)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdf82f3a68c6bb07042ef4bda94de58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40ac9e8d454e09fd556e05263c83468.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481532dca39931940700dc90bab522bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/1eed6d60-daac-4f2e-9eaa-49782b9d9009.png?resizew=208)
A.12.8 | B.13.3 | C.13.8 | D.14.3 |
您最近一年使用:0次
2023-01-19更新
|
425次组卷
|
2卷引用:海南省2023届高三上学期期末学业水平诊断数学试题
12-13高三上·海南省直辖县级单位·期末
名校
解题方法
7 . 已知全集
,集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fe14068d0c91108993067d1187e1d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e0b7eeaaa805c1dc0c8044e5409b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0de9eb3388612522ffaec2dc0ba5ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fe14068d0c91108993067d1187e1d9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
8 . 已知
,
,
,则它们的大小关系是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77edddb47493cf50496e748008b26d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f00a0f0a70daba225b09fdd8f1a4a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4617ea148bd459df2b653e95c96d2fd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-02-13更新
|
543次组卷
|
3卷引用:海南省2018届高三上学期期末考试数学(理)试题
9 . 设集合
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/758c86d377c89c650dfa99ff46df5c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3b24d8d2e27112dea4cc0c6e0a0796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/426fb3c5ceeaf7264961389de29e0e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ef3deb77e0a21db4cff654b2735763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/758c86d377c89c650dfa99ff46df5c64.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
14-15高一上·湖北·期中
解题方法
10 . 设
和
是定义在同一个区间
上的两个函数,若函数
在
上有两个不同的零点,则称
和
在
上是“关联函数”,区间
称为“关联区间”.若
与
在
上是“关联函数”,则
的取值范围是
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/55d50f9043bc4d1282d9172f09057e2a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/f7832ab3b9dd477bb92c92a699a7936a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2aa27f21713b43d8abc157530503590e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/8e864b933fc34d68af4a8580623830b2.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/d89e13a3fa8143169cd71a7c552f04c5.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/55d50f9043bc4d1282d9172f09057e2a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/f7832ab3b9dd477bb92c92a699a7936a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2aa27f21713b43d8abc157530503590e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2aa27f21713b43d8abc157530503590e.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/2c77d0ce527042268fb589daf2d618f3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/f4715dd06f33493aa885fd3f27a3aaa3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/1300f0d3913a40b0b1260179dc9984e1.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572710845874176/1572710851862528/STEM/08ea8633893d4221b2eb36b3e55da194.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
383次组卷
|
3卷引用:2016届海南省文昌中学高三上学期期末考试理科数学试卷