解题方法
1 . 已知
,使
;
不等式
对一切
恒成立.如果
为真命题,
为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf412e40a85403fd9aeb9a866f874d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b8ffbc34fbce4e804337a754599cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef6e0b01e5a5a6288dd25376a786c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f648f2cd0b3784602d678653c406bb38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2022-03-05更新
|
206次组卷
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2卷引用:河南省洛阳市2021-2022学年高二上学期期末考试数学(理)试题
名校
2 . 定义在D上的函数
,如果满足:存在常数
,对任意
,都有
成立,则称
是D上的有界函数,其中M称为函数
的上界.
(1)证明:
在
上是有界函数;
(2)若函数
在
上是以3为上界的有界函数,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02cab1add26335b3cb43d5b54c7c853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea232de27d21a2646fd4520ea0726bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1510639120a1883e66f13794a9df9179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497199a00f177af4c593e0e715be97f1.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf9d5059d521dd762d81a41855d77f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca5e984d5e14b4be18a5ee99f80a4f.png)
您最近一年使用:0次
2022-03-04更新
|
473次组卷
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3卷引用:吉林省长春市十一高中2021-2022学年高一上学期期末数学试题
名校
3 . 已知函数
.
(1)求函数
的解析式及定义域;
(2)求函数
在
时的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6cfc96b68ea3b3b9441467b7f7f081.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1921a10a845532a374875a4d575ac5da.png)
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2022-02-20更新
|
2443次组卷
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3卷引用:辽宁省大连市大连育明高级中学2021-2022学年高一上学期期末数学试题
解题方法
4 . 若存在常数
,使得对任意
,
,均有
,则称
为有界集合,同时称
为集合
的上界.
(1)设
,
,试判断A、B是否为有界集合,并说明理由;
(2)已知常数
,若函数
为有界集合,求集合
的上界
最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd2491dc0189bacbcb09d74ee95e9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e53000c7d332ec7583f9b3507eb8ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53855d56382110218bc98b235a5a971f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5a297689c23bc4a57a888c53ba3b4c.png)
(2)已知常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8f57aad6fb5182c7c87607b007af4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
名校
5 . 已知定义在R上的偶函数f(x)和奇函数g(x)满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca86614e2c616c62069758a07d9e2d4f.png)
(1)求函数f(x)和g(x)的表达式;
(2)当
时,不等式
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca86614e2c616c62069758a07d9e2d4f.png)
(1)求函数f(x)和g(x)的表达式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d714335bc3f6b42abc9ba41cadd5a570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7095f547dc3dd7c37eedb1a22e782e50.png)
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2022-02-16更新
|
585次组卷
|
4卷引用:江西省新余市2021-2022学年高一上学期期末数学试题
6 . 已知函数
是奇函数.
(1)求实数a的值;
(2)求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e59926e0de6c10c6b791cb14cf61268.png)
(1)求实数a的值;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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7 . 已知函数
的定义域是
,且
.
(1)求函数
的定义域和值域;
(2)若函数
对定义域内任意的实数
,
,
,
,都有
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610b13854b5cc5abb72f3411a3785d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f16dc77b55210db4309e58ba32e4906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8dc6a909f4513432f89665eef90d4f.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc6e69ad1a27916fb5c3d5901ded134.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc6e69ad1a27916fb5c3d5901ded134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0391f9d4facffcb87e8d6cad6bb3daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2022-02-10更新
|
472次组卷
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2卷引用:江西省赣州市2021-2022学高一上学期期末数学试题
名校
8 . 已知函数
.
(1)求
的值;
(2)求函数
的值域;
(3)若
,且对任意的
、
,都有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b897d42526be27494db78f685d09ca88.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7644c1e19089a00e3f630f82dcb7244.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1029cd644917b65c419fe372cd5db2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33890c6b0bf167514d44139d9dca0154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcef2da543513a6176d17d271f7ebf43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2022-02-10更新
|
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4卷引用:广东省深圳市光明区2021-2022学年高一上学期期末数学试题
名校
9 . 已知函数
.
(1)利用函数单调性的定义,证明:函数
在区间
上是减函数;
(2)若存在实数
,使得函数
在区间
上的值域为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b047ffee43760a458d9c1d3740376ce2.png)
(1)利用函数单调性的定义,证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2aabc96b7433bba077ceac76d8f0d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/351629c193354cdcf202133052e45028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a17639bec47bbb6843615094d87aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2022-02-03更新
|
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|
3卷引用:江苏省南京市2021-2022学年高一上学期期末数学试题
名校
解题方法
10 . 设定义在
上的函数
、奇函数
和偶函数
,满足
,若函数
.
(1)求
的解析式;
(2)求
在
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc50f609440a36953561a88e8acfee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b583db564652742ec2629d9d0b8b44e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
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2022-02-02更新
|
570次组卷
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2卷引用:江苏省南京师范大学附属中学2021-2022学年高一上学期期末数学试题