19-20高一·全国·课后作业
1 . 若
的解集是为
,则实数
的范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4a3d93c419872c06d24d26a50aa5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2df1bc516cf59796f7610454440afc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
2 . 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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3 . 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
|
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4 . 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.
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5 . 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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名校
6 . 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
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名校
7 . 已知函数
.
(1)若
,使得
成立,求
的范围;
(2)求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa02b8c401af4fd18b6b18059a0fbe37.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e7d4694604abe0ebc36818ee192a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca5f62e36c402a39ad53d1095d7028a.png)
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2017-05-07更新
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2011·辽宁沈阳·模拟预测
8 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcb7de1ab331c17c5eca5f8861daf42.png)
(1)求不等式
的解集;
(2)若不等式
(
,
,
)恒成立,求实数
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcb7de1ab331c17c5eca5f8861daf42.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76f1d80616e20719e1d5ce276bb581f.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673b684c5501f1bbae50186f48353bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a64103561364ac4c9460a72c9e154bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980a8c4eb822aeb591ceacfe8a7aaa11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bea9391c115618bb84a7aa3da8a242d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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9 . 已知关于
的不等式![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085980110848/STEM/dba70f5f7f2147f4a05676430ca399df.png)
(1)当
时,求不等式解集;
(2)若不等式有解,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085980110848/STEM/dba70f5f7f2147f4a05676430ca399df.png)
(1)当
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085980110848/STEM/8f6fa0b96d1048c3a8b92e691753178a.png)
(2)若不等式有解,求
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572085973999616/1572085980110848/STEM/e0493782cbb6450a8bed041885e1be98.png)
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2016-12-03更新
|
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2014·江西·二模
10 . ①(坐标系与参数方程选做题)在极坐标系中,已知圆C经过点
,圆心为直线
与极轴的交点,则圆C的极坐标方程是_______ ;
②(不等式选做题)已知关于x的不等式
的解集为
,则实数
的取 值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c1dd0d282af6a2ba9920877a06f2c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a512ad265e775855a219356a9f40b4.png)
②(不等式选做题)已知关于x的不等式
![](https://img.xkw.com/dksih/QBM/2014/6/4/1571754783719424/1571754789265408/STEM/f0639c5340df4c91816147b1d3cc0bd4.png?resizew=121)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1571754783719424/1571754789265408/STEM/35d70e740ab44e7b9976c650d590a111.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1571754783719424/1571754789265408/STEM/1a9961ff3ec44af892368e4362b1c0b2.png?resizew=14)
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