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解题方法
1 . 设
、
、
是互不相等的正数,则下列等式中不恒成立 的是( )
![](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)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 已知函数f(x)=|x+4m|+|x+2m+1﹣3|.
(1)当m=1时,求不等式f(x)≥7的解集;
(2)试证明f(x)≥2.
(1)当m=1时,求不等式f(x)≥7的解集;
(2)试证明f(x)≥2.
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3 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8ac9b7ed7618fd6642ea91cb76bd10.png)
(1)若
,解不等式
;
(2)对任意满足
的实数
,若总存在实数
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8ac9b7ed7618fd6642ea91cb76bd10.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7e5cd65bc9d3051c2c72311ca8f88d.png)
(2)对任意满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0fd9bc1d6d38e8b24578be73a47e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd02ceddf9a8b83b0e41117569c9bb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfae436893529fee560f5c18fcf87a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 若集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a526e547c013196bba3506449096421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
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5 . 已知:
,其中
.
(1)求证:
;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04959523a28786962d51cfb43a8767d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a848c22fe7c4d0d8e93d0f7d5724f1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e48ece0b2e68afe094f32cb087f555.png)
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2019-05-12更新
|
1085次组卷
|
6卷引用:【市级联考】安徽省蚌埠市2019届高三年级第三次教学质量检查考试数学(文史类)试题
【市级联考】安徽省蚌埠市2019届高三年级第三次教学质量检查考试数学(文史类)试题【市级联考】安徽省蚌埠市2019届高三年级第三次教学质量检查考试数学(理工类)2020届广东省汕头市高三第二次模拟数学(理)试题2020届广东省汕头市高三第二次模拟数学(文)试题(已下线)3.4+基本不等式(1)-2020-2021学年高二数学课时同步练(人教A版必修5)宁夏银川六盘山高级中学2021届高三二模数学(文)试题
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6 . 已知实数
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fafde379cf65effcdb9125f1845757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fca4944e5bef09467cd9af1b7037876.png)
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2019-05-05更新
|
483次组卷
|
7卷引用:【全国百强校】江苏省海安高级中学2019届高三第二学期四月模拟考试数学试题
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解题方法
7 . 已知集合
,
,
;
(1)若
,求
的取值范围;
(2)若
,求
的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec151341467e708e510c1a70a5cc69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6c1490e8af486f5d95a7da271eca36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d802e4db6d544c0096603d476528b96.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea839182e307f7e0b28763d0abb41a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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真题
8 . 解不等式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afac019ceed6540ee4dd681b21db8ac0.png)
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9 . 若|a|<1,|b|<1,则( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
10 . 设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222e26de21e5a823b605eb70a73c29da.png)
且
,
,
,
(1)求
;
(2)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222e26de21e5a823b605eb70a73c29da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d974bd8625075dfb0ce9382103008c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81317b6ed916ff92982a1c2c44e5f9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a487761713b03026b2b9c5b5984352fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636d6d061589f4079285caca8a57cb17.png)
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