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1 . 设函数
.
(1)求出函数的定义域;
(2)若当
时,
在
上恒正,求出
的取值范围;
(3)若函数
在
上单调递增,求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d803777184cf8fbf3a939cd4c7eb7d9d.png)
(1)求出函数的定义域;
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def69169bdaed7b6561372cc26396d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7b2668d8fcf713370822c8e368ba7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-01-31更新
|
1418次组卷
|
4卷引用:上海市松江二中2017-2018学年高一上学期12月月考数学试题
上海市松江二中2017-2018学年高一上学期12月月考数学试题(已下线)考点10 对数函数(练习)-2021年高考数学复习一轮复习笔记安徽省江淮名校2020-2021学年高一下学期开学联考数学试题重庆市礼嘉中学2020-2021学年高一上学期11月月考数学试题
2 . 已知函数
.
(1)求函数
的定义域
,并判断
的奇偶性;
(2)如果当
时,
的值域是
,求
与
的值;
(3)对任意的
,
,是否存在
,使得
,若存在,求出
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e983deb093f8a8847b5a27ac8435239.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)如果当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c880d6aacf2727f9787e7452eceb3fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d8fcaef916db4b90e9ce3054974759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28e384ba050b238e11f7c74d3002aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ed8a3eb8fc3fa0d2e6ff6b4f50e873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403539939dee807924af857b4cdde516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
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3 . 已知函数f(x)=lg
,f(1)=0,当x>0时,恒有f(x)
=lgx.
(1)若不等式f(x)≤lgt的解集为A,且A(0,4],求实数t的取值范围;
(2)若方程f(x)=lg(8x+m)的解集为,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57ffd06f1fadfd541574af2562d4411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e717e142c9eadd80cca1f86b247a962.png)
(1)若不等式f(x)≤lgt的解集为A,且A(0,4],求实数t的取值范围;
(2)若方程f(x)=lg(8x+m)的解集为,求实数m的取值范围.
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4 . 函数
.
(1)求
的定义域;
(2)讨论函数
的单调性;
(3)解方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb00d3da21c7f685840b0b76b192518.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce1a088267f3ca7c76badafa99fc9a9.png)
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2020-01-23更新
|
244次组卷
|
2卷引用:上海市上海理工大学附属中学2015-2016学年高一下学期3月月考数学试题
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5 . 已知
满足不等式
,求函数
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8e52ad53b553f99cbd8284d6d8e614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d284d3ad66f477dd9b59967651d15818.png)
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6 . 已知非空集合
是由一些函数组成,满足如下性质:①对任意
,
均存在反函数
,且
;②对任意
,方程
均有解;③对任意
、
,若函数
为定义在
上的一次函数,则
.
(1)若
,
,均在集合
中,求证:函数
;
(2)若函数
(
)在集合
中,求实数
的取值范围;
(3)若集合
中的函数均为定义在
上的一次函数,求证:存在一个实数
,使得对一切
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5f5f81ea1a02b88ff8491fcf4937db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a2a1822ac7392b61b2c0fffc1fbc05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7de4de1315f460681d9da70dd8fc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5f5f81ea1a02b88ff8491fcf4937db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a18ca67c2770b98f36dbfd802595a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbec485ab7b15f1e09f163fe990577c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd1f807dd5b1507c823ad8c1db55a6c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c8726575585ccd6e00c02033825374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e62e7482ee75b0768111a4df5f0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10c7b4247b574fc4b71d6e02ebf2d20.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e5552d315d2ea9b01d112dca830754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5f5f81ea1a02b88ff8491fcf4937db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bc955d158efde0bdd62d14a60a65e3.png)
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2020-01-16更新
|
774次组卷
|
3卷引用:2016届上海市杨浦区高三5月模拟(三模)(理)数学试题
名校
7 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3fda856846a1ecf58c59e5648e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b93abe2a497b7ef3cb8c1b9de8492e.png)
(1)求函数
的解析式;
(2)设
,是否存在实数a,使得当
时,恒有
成立,若存在,求出a的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3fda856846a1ecf58c59e5648e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b93abe2a497b7ef3cb8c1b9de8492e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9afb528423ed6c19355ca8bd8f2359.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b5bb7d965a28e07f40eef633903168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f91677b23015a1bd7ea515397f8c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d20e219772fce9f555c8c4200da33.png)
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8 . 已知函数
在
时恒取负值,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701c337c0ecd24e56836d7d8780652bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53224898de85a85058ad336490bbbaa7.png)
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9 . 解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b9c18f7f4685c74ea725f63106c813.png)
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15-16高三上·上海浦东新·阶段练习
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10 . 已知集合M满足下列性质的函数
的全体:在定义域
内存在
,使得
成立.
(1)函数
是否是集合M的元素?若是,求出所有
组成的集合;若不是,请说明理由;
(2)若函数
求实数
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58739d0c2b1a30d3c2627b0bef7d872e.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ff73150f86419bd7f0415942a5df4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daffd6416fe8cdaf3b5b6002cad6882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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