已知函数
.
(1)解不等式
;
(2)若不等式
对任意的
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c997682e56d4ef7d9d9db07026b48c.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc6d8acdd4244dc03f2bdc117c6ba30.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77dc3a51512b46b83e8e97af5a5cf8ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793a4ec89283e1c309675a0d883af1a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2016-12-04 05:23:22
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解答题-问答题
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适中
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【推荐1】已知f(x)=|x+a|+|x﹣b|(a>0,b>0).
(1)当a=b=1时,解不等式f(x)≥8﹣x2;
(2)若f(x)的最小值为2,求
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(1)当a=b=1时,解不等式f(x)≥8﹣x2;
(2)若f(x)的最小值为2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2675d26eab4a2ec8534d9d49a26d4af.png)
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解答题-证明题
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名校
【推荐2】 已知
.
(1)求不等式
的解集;
(2)若
的最小值为
,且
(
,
,
),求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d172121502d6dd5893a71f95a5d766d6.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0fe9c10af4462a64db1f6e9cf52ee5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd5ec21b5c2b1d5b18ae6b27bc207fa8.png)
![](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/33f306d2b261f4c39a9fc0858d96e647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026a8139e4a47badf8ce7b7f5945c19d.png)
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解答题-问答题
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【推荐1】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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解答题-问答题
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解题方法
【推荐2】已知函数
.
(1)
时,求不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63510b7bff1f176e86abd7db175a102f.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2608a57caffde627dbf140ca22a2ff8a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810e8fa5cf17ae94a41803772c488726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ca681ae72055316ef35c01fdb27034.png)
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