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解题方法
1 . 选修4-5:不等式选讲
已知函数
.
(1)求不等式
的解集;
(2)若
,且直线
与函数
的图像可以围成一个三角形,求
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1e737b375f3102c2d9fecc64bb6b96.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc7e9d2e2128229001839a2ed1d94c5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39efe1e6096b9939a8ca26b5efd9641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259535f834f003f6e787de29d02993fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2017-04-28更新
|
687次组卷
|
5卷引用:2017届江西省百所重点高中高三模拟试题数学理科试卷
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2 . [选修4-5:不等式选讲]
已知函数
,
为不等式
的解集.
(1)求
;
(2)证明:当
时,
.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8fd8f8dee1cf577f8076d6b7ea681b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5d535d8977a666b63ceb3648d7d91c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3cd133b72d6c0fa24db897a0d58802.png)
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2018-06-15更新
|
179次组卷
|
2卷引用:【全国百强校】重庆市第八中学2018届高考适应性月考(六)数学(文)试题
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3 . 已知f(x)=|2x﹣1|﹣|2x+1|.
(1)求不等式f(x)>1的解集.
(2)当
时,求证:4x2+4x+2>(2x+1)f(x).
(1)求不等式f(x)>1的解集.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d8cac9b417849a2a3c8d604e05987e.png)
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4 . 在平面直角坐标系中,定义点
,
之间的“直角距离”为
.
(1)已知
,
,
三点,若
,求
的取值范围;
(2)已知
,
,
三点,对任意
,
,不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f054b3318e916b6be06f1eab0dd4b3e5.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec48b229afb57565f24fbd514dff5b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266504a4bd910b292c74765dc9772f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3f9d5a2752ca0a9cf9f5b8ad62d9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bea9f9622001dfb58248ffeea0f0b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a10df05893f0e1379e7bb25eeaf1e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3544997cc034ed882c0d0a3bdbf5f957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f320864176e4083ee7c9f07fefece18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d314ad369d304619915f3a7429898ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
5 . 设函数
.
(1)求不等式
的解集;
(2)若存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8e5ec5acd6af8bf90757fd8eb93987.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640d3bcd10055871a5ec2f442c1030c1.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd60ce4d27c99ea01b058731ead6b2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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6 . 选修4-5:不等式选讲
已知
.
(Ⅰ)解不等式
;
(Ⅱ)若
有解,求实数
的取值范围.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b340aedf0ea79ed4dce6abf3fe7e106.png)
(Ⅰ)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc42c1dcd2d8574feaacb9ac2829c078.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e7d4694604abe0ebc36818ee192a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2017-05-12更新
|
564次组卷
|
2卷引用:重庆市第八中学2017届高三高考适应性月考(七)数学(文)试题
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7 . 设
,
,
.
(1)解不等式
;
(2)
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf53f232cd433b791e3696c0ba97750b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4367e45a47a02037a38bd591dd09f930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640cb603fc8315d9e37c97561f6a7b83.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee59fbe13325820ec6fc47eb5f35d87.png)
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8 . 已知命题
不等式
的解集为
,命题
是增函数, 若
或
为假命题,
且
, 求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2437d10ec86fcd0ecc740e0d9782cf37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073de56d55833ca18ac1494682c18dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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14-15高三上·青海西宁·阶段练习
9 . 《选修4-5:不等式选讲》已知函数
.
(1)证明:
;
(2)求不等式
的解集.
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919353896960/1571919359934464/STEM/3b3dd46f93404f98b576c0e7b5acf6f9.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919353896960/1571919359934464/STEM/2ba6d78b7c9748dbb9a985f019297966.png)
(2)求不等式
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919353896960/1571919359934464/STEM/28a6ccd4a6ce42d5b2bdb1686effb9c8.png)
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