2023高一·上海·专题练习
1 . (1)证明:
对所有实数
恒成立,并求等号成立时
的范围.
(2)设不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7e7e78d71dd8a58479e052c999202c.png)
的解集为A,且
,
;
①求a的值;
②求函数
的最小值,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36d2c4f845bd8e3b91441c65b6a9db6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7e7e78d71dd8a58479e052c999202c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9fae1e402d20c8cedab0fd9e6fb8d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0007234d5c4e1e2c5ffaf75d51734df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86c7339700b762ba814a67bed5f984d.png)
①求a的值;
②求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00445f69344c65acd30662446343297c.png)
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解题方法
2 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)对于任意的正实数m,n,且
,若
恒成立,求实数a的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447ea620900858bad3b916dec0f091a7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188281cc0c7af6e95c32b9bbb94ffc21.png)
(2)对于任意的正实数m,n,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a548d0b3ceef145f2f1583d02d70f769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df45c04a9ee9f91fbdb04fd68b64befd.png)
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2023-05-03更新
|
176次组卷
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2卷引用:新疆乌鲁木齐市等5地2023届高三高考第二次适应性检测数学(理)试题
解题方法
3 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)若不等式
对
恒成立,求实数a的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995e2474f312e53340f0570178a26008.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7e5cd65bc9d3051c2c72311ca8f88d.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed408d3a43e0c6f6939b87346ea308c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb099907c15816b4b329715e80aea70f.png)
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4 . 已知函数
.
(1)若不等式
的解集为
,求
的值;
(2)若关于
的不等式
有解,求
的取位范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8327be2dd861aba12773e281c6f3582.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aa539556add14df9b3fc68b9827464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a001b721510e3c4ae08c60f67854f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0053ded22e66e1d899ad8a268828e8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2021-03-23更新
|
367次组卷
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2卷引用:河南省金太阳2021届高三下学期3月联考(I卷)理数试题
解题方法
5 . 已知
.
(1)若
.关于
的不等式
的解集包含区间
,求
的范围;
(2)若
的最小值为5,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd20f8454292a973dbfaa9e94cb0311.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2677d8cb044df55cbca3c905c286a952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a0d5dc7533a26efbe6d75f9712b582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/175d0c99e866f1db915462a91b356ef3.png)
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6 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)若
的解集包含
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4e226accac2bf17aa57b27686dfb96.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dd18467feea8eb478f4669a32c2d57.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810e8fa5cf17ae94a41803772c488726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b448fe164c2c2931805e3b3847dcdd75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2018-07-02更新
|
224次组卷
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2卷引用:【全国市级联考】江西省吉安市2017-2018学年高二下学期期末考试数学(理)试题
名校
7 . 设f(x)=|x-a|+|x-2|,其中a<2,已知f(x)图像关于直线x=
对称
(1)求a的值,并作出函数f(x)的图像,
(2)是否存在实数m,使得不等式f(x)<m(x2-4x)的解集包含区间 (
,3)?若存在,求m的取值组成的集合;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求a的值,并作出函数f(x)的图像,
(2)是否存在实数m,使得不等式f(x)<m(x2-4x)的解集包含区间 (
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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2018-05-05更新
|
336次组卷
|
2卷引用:【全国百强校】宁夏银川市第二中学2018届高三下学期高考等值卷(二模)数学(理)试题
8 . 选修4-5:不等式选讲
已知关于
的不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbc66d579ade3359bd3fb55bdeb4f59.png)
(Ⅰ)当a=8时,求不等式解集;
(Ⅱ)若不等式有解,求a的范围.
已知关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbc66d579ade3359bd3fb55bdeb4f59.png)
(Ⅰ)当a=8时,求不等式解集;
(Ⅱ)若不等式有解,求a的范围.
您最近一年使用:0次
9 . 已知函数
.
(1)求不等式
的解集;
(2)若
对于
恒成立,求实数
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210bb4974c1096c56265954f29a7aeb9.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9491f776adab0f069bbff1f7e08e1b7d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be311d871ce0b96dc9f2bee3b253898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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