1 . 已知函数
,定义域为
.
(1)讨论
的单调性;
(2)求当函数
有且只有一个零点时,
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b524c2fcb094954f09626b08536ef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求当函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2024-06-11更新
|
674次组卷
|
2卷引用:广西河池市2024届普通高中毕业班适应性模拟测试数学试题
2 . 某大学研究机构选择了网络游戏这一项目作为研究,来了解网络游戏对大学生的影响.该机构共在某高校发放50份问卷调查,有34名男同学,16名女同学参加了这次问卷调查活动,调查的结果如下图:
的独立性检验,能否认为大学生喜欢玩网游与性别有关?
(2)视本次问卷中的频率为概率,在该校所有学生中任意抽查5名学生,记其中玩过网游的人数为
,求
和
.
附:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0298d106f2b72aadf3cffce041a25da6.png)
玩过网游 | 没玩过网游 | 总计 | |
男生 | |||
女生 | |||
总计 |
(2)视本次问卷中的频率为概率,在该校所有学生中任意抽查5名学生,记其中玩过网游的人数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e39326381d0fbd83c8156c3b33e74eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0919cf56a1b743189a019551b2d5a0.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481998e1e8504ffff178f656be3c068e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.1 | 0.05 | 0.01 | 0.005 | 0.001 | |
2.706 | 3.841 | 6.635 | 7.879 | 10.828 |
您最近一年使用:0次
名校
解题方法
3 . 若实数
,且
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39155d3ddd1313d56725a722794b68e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84e1509530525c3c02aac31d524bb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7deb2139d24f83256ef581fd8d3cc36.png)
您最近一年使用:0次
2024-06-04更新
|
1379次组卷
|
2卷引用:广西河池市2024届普通高中毕业班适应性模拟测试数学试题
名校
4 . 设全集
,集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282e995abdf2a7a0be290f9538359968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5db13b0d326e5d1304177f0439c679e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35cc4f4fd18f6e23987a7ff500f1b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fed3bd5bc925cf990e057f43395bff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-06-04更新
|
502次组卷
|
3卷引用:广西河池市2024届普通高中毕业班适应性模拟测试数学试题
5 . 古希腊数学家阿波罗尼斯的著作《圆锥曲线论》中有这样一个结论:平面内与两点距离的比为常数
(
)的点的轨迹是圆,后人称这个圆为阿波罗尼斯圆.已知点
,
,动点
满足
,若点
的轨迹与圆
:
(
)有且仅有三条公切线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472393b18c7880e73b40e31fbe2d951c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e2db2888cf296b8f56c3702dcd8435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdb7b37d9b96793ec84d60bef24586f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a2b1f5228d0dd50ae4c229b8c64da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ba6b6aa6c3f9faba6b03bc193a6e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e40e3883271c3580c1d3c805dcac6.png)
A.![]() | B.1 | C.2 | D.3 |
您最近一年使用:0次
6 . 如图,
平面
,
∥
,
,
,点
是
的中点,连接
.
∥平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354c20e085fe1a99a8be03bd1d16b2f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bea52ad6771c9a15dc74a027b258ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2024-06-02更新
|
894次组卷
|
2卷引用:广西河池市2024届普通高中毕业班适应性模拟测试数学试题
解题方法
7 . 双曲线
(
)的一条渐近线方程为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5451ffa7df608ff6a37195768ee980b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b386e2c5d9ad7cec404ce5c40dbebe42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.![]() | B.![]() | C.3 | D.![]() |
您最近一年使用:0次
8 . 已知椭圆
:
(
)的离心率为
,点
为左顶点,点
为上顶点,
,不经过点
,
的直线
过原点且与椭圆交于
,
两点.
(1)求椭圆
的方程;
(2)设直线
的斜率为
,
的斜率为
,证明:
为定值;
(3)求
,
,
,
四个点组成的四边形的面积的最大值,并求出此时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3287fe7ab879d8756115a5d4d22d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
9 . 已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f50cfd24855aee88047919609b0109d.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.![]() |
D.![]() ![]() ![]() ![]() |
您最近一年使用:0次
10 . 样本数据24,8,35,23,7,10,11,30的60%分位数为______ .
您最近一年使用:0次