1 . 已知函数
.
(Ⅰ)求不等式
的解集;
(Ⅱ)设函数
的最小值为
,正实数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306fea7ece95338594f5b7d956220a07.png)
(Ⅰ)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a234b3bb2d3292921d8b30f04cd346f8.png)
(Ⅱ)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083dc129f8721a98e079b0f34abd3196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f3eaf765a0a41b149e7896735ed1bd.png)
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解题方法
2 . 已知函数
的最大值为
.
(1)求
的值;
(2)已知
、
、
为正数,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705a121ba6ec1be81778c26340cdaff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)已知
![](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/989680e6b74504b71f5ece8771c5301d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c443e84586e9408cda8a9d75ef801f2.png)
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2020-07-02更新
|
108次组卷
|
3卷引用:广东省深圳外国语学校2019-2020学年高三下学期4月月考数学(理)试题
名校
解题方法
3 . 已知函数
.
(1)若
,求
的取值范围;
(2)若
最大值为
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b356ee435121430e67e3b388909d7fe.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e799e937076aa5a7dcd51cdc0f40f6b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989680e6b74504b71f5ece8771c5301d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f9a67d0c6387f646e9041cc37ef63d.png)
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2020-06-08更新
|
395次组卷
|
3卷引用:甘肃省西北师大附中2020届高三5月模拟试卷 文科数学试题
名校
解题方法
4 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70af7ea1e43238f46e537032b7234494.png)
(1)求函数
的最小值m;
(2)在(1)的条件下,正数a,b满足
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70af7ea1e43238f46e537032b7234494.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)在(1)的条件下,正数a,b满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6964f26e70afe3d425ea971d3212bb9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0e403c5f00d0357d3fa30d6c2717c.png)
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2020-04-09更新
|
506次组卷
|
6卷引用:山西省2019-2020学年高三下学期3月适应性调研数学(文)试题
解题方法
5 . 已知函数
.
(1)求
的最小值
;
(2)若正实数
、
、
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbd066f1749c5137dc5ed5be51bb1bc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d42aabb19773fce295b7af6d748e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6cedcfa8b128453e3e680e372bcf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a854bbc7958d352e8b334d2b633327a7.png)
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2020-06-04更新
|
254次组卷
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2卷引用:百校联盟2020届高三5月教育教学质量监测考试(全国Ⅰ卷)文科数学试题
名校
解题方法
6 . 已知
,
,
设函数
,
.
(1)若
,求不等式
的解集;
(2)若函数
的最小值为1,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c590477ba7ab23bf38b1ac869d9a5102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7126d6d76248996a222631cc9ea93c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7679f885826301bb5a826ba7bcea01.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561778633769683f584422a6805e4736.png)
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2020-03-22更新
|
635次组卷
|
9卷引用:【全国百强校】四川省成都市成都外国语学校2018届高三下学期3月月考数学(文)试题
【全国百强校】四川省成都市成都外国语学校2018届高三下学期3月月考数学(文)试题【全国百强校】四川省成都外国语学校2018届高三下学期3月月考数学(理)试题江西省南昌市四校联盟2019-2020学年高三第二次联考数学(理)试题山西省山西大学附属中学2019-2020学年高二下学期5月月考数学(文)试题西藏自治区拉萨中学2021届高三上学期第四次月考数学(文)试题四川省成都市第七中学2019届高三二诊数学(文)模拟考试试题四川省成都市第七中学2019届高三二诊数学(理)模拟考试试题安徽省蚌埠市第二中学2019-2020学年高三上学期期中数学(理)试题2019届黑龙江省哈尔滨市第六中学高三第四次模拟考试数学(理)试题
7 . 已知定义在
上的函数
的最小值为
.
(1)试求
的值;
(2)若
,且
.求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361e49692c07d362ebf7c7ed812d627b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
(1)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa70cba471ba57de69c962db483173f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174618ea6b1cf2038101e9fddf16e024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f9a67d0c6387f646e9041cc37ef63d.png)
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8 . 已知正数
,
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370364f5a8fb1efc4120032208e60d44.png)
(1)证明:
;
(2)若存在实数
,使得
,求
,
.
![](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/370364f5a8fb1efc4120032208e60d44.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26804b667c25e3ef7adae5fb4002d2b0.png)
(2)若存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4dfc95b47ea3197e27f136385254191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解题方法
9 . 若不等式
对于任意
都成立.
(1)求
的值;
(2)若正实数
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b01ef7c6c69fb7f54d4c881eeaf1d05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c18fedc19fbd7388afccce4445e7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe2d3d476fa9469873f9f12bb1580b7.png)
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2020-03-20更新
|
113次组卷
|
2卷引用:2019届海南省华侨中学高三第四次月考数学(理)试题
名校
10 . 已知定义在R上的函数f(x)=|x﹣m|+|x|,m∈N*,存在实数x使f(x)<2成立.
(1)求不等式f(x)>8的解;
(2)若α,β≥1,f(α)+f(β)=4,求证:
.
(1)求不等式f(x)>8的解;
(2)若α,β≥1,f(α)+f(β)=4,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edd754b4100ee82a9e4ea1ec80abb89.png)
您最近一年使用:0次