解题方法
1 . 设集合A={x||3x+1|≤4},B={x|log2x≤3},则A∪B=( )
A.[0,1] | B.(0,1] | C.[![]() | D.[![]() |
您最近一年使用:0次
解题方法
2 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6890096e4a18dd90fd4d0e8f0cbaf4.png)
(Ⅰ)当
时,求不等式
的解集;
(Ⅱ)若关于
的不等式
的解集包含
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743570a5e44dcea6a7a04e7796fda136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6890096e4a18dd90fd4d0e8f0cbaf4.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369100ccd44feaa77e5f119ea949a879.png)
(Ⅱ)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
3 . 已知实数
,
满足:
.
(1)求证:
;
(2)若对任意的
,
,
恒成立,求
的取值范围.
![](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/254aebe3ef7eabdf41e46c1cd857c705.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7df04737303a839eb01c934bb2f0545.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b7ca6979653c1fabf321efee3e82eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39a153e1252316968938b9ddc4b009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
解题方法
4 . 已知
.
(1)解关于
的不等式
;
(2)对任意的
都有
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8f7907ae1e0b4eafc05a730ecd2109.png)
(1)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b562ca77fa64f3ebe40e0ad49833d5.png)
(2)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5daf066ce3cb2f157c7ecac9dfe8d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-05-18更新
|
251次组卷
|
2卷引用:2020届湘赣皖十五校高三下学期第二次联考数学(文)试题
名校
解题方法
5 . 已知函数
.
(1)若
,解不等式
;
(2)若函数
的图象与
轴围成的三角形的面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b56c85bc4510b23a84ae9bc8c65e502.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f61db73a5a9bce4ece8259a4c7d29376.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d754c4ad51e4482e12a615d20a13fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-09-12更新
|
639次组卷
|
8卷引用:金科大联考2019-2020学年高三10月质量检测数学文科试题
金科大联考2019-2020学年高三10月质量检测数学文科试题2020届陕西省安康中学高三第三次模拟考试理科数学试题山西省应县第一中学校2021届高三上学期开学考试(高二下学期期末)数学(理)试题(已下线)2023年高考全国乙卷数学(文)真题变式题21-23(已下线)2023年高考全国乙卷数学(理)真题变式题21-23(已下线)2023年高考全国甲卷数学(文)真题变式题21-23(已下线)2023年高考全国甲卷数学(理)真题变式题21-23(已下线)信息必刷卷01(文科专用)
名校
6 . 设
,
,
都是正数,且
.
(1)求
的最小值;
(2)证明:
.
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f6a1730b69e56db541821513a1bbbb.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3feaa7c319b102fd429dccde352c7e7b.png)
您最近一年使用:0次
2020-05-13更新
|
1205次组卷
|
5卷引用:2020届华大新高考联盟高三4月教学质量测评数学(理)试题
7 . 若对于实数
,
有
,
.
(Ⅰ)求
的最大值
;
(Ⅱ)在(Ⅰ)的条件下,若正实数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669adbbb51de05a3d4f27e245d004050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e1371b5ffd29041b1dc86bfd406d2c.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4769398000868a14fa322d0b1df97c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(Ⅱ)在(Ⅰ)的条件下,若正实数
![](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/3c568952f0da52aa9d0583377981a02f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255b5812e63fd28e1eba816f71417b5f.png)
您最近一年使用:0次
2020-05-13更新
|
405次组卷
|
5卷引用:天一大联考2019-2020学年高三毕业班阶段性测试(五)理科数学试题
解题方法
8 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfaa9e73ac63fc881edd08ebb9b781b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdaffa9c15517afe6d7ba6488f88f67.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a5903c92c2d683e62671e7a42d78c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-05-09更新
|
187次组卷
|
2卷引用:2020届全国100所名校高三模拟金典卷文科数学(一)试题
解题方法
9 . 已知函数
,
.
(1)当
时,求不等式
的解集;
(2)若关于
的不等式
的解集包含
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dd0416b3dd8a72cf6243d55bf4be8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad5fe039313115ca360d6fd43310825.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a81e971f501d78f5560c0c3d42f0f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41dbb9cc44721099e2f2127561d32888.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b2e67cd10ebbced3d964ab0dc5c298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
10 . 设
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3eb20d7e43b5e7fc47e62e15aca8e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e400a391c4648d5d94fb6961e18f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7253bbf95c50b03e64fcec01f4a0ba2d.png)
A.充要条件 | B.充分不必要条件 | C.必要不充分条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2020-05-07更新
|
125次组卷
|
2卷引用:2020届全国100所名校高考模拟金典卷高三理科数学(七)试题