已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29183b9e99452d069d552257fc1f80e.png)
(1)当
时,求不等式
的解集;
(2)若不等式
的解集为实数集
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29183b9e99452d069d552257fc1f80e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce25393cca5895dfb81ac9d681b5192.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2019-05-01 11:45:11
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解题方法
【推荐1】设甲:
,乙:
.
(1)当
时,求甲中不等式的解集;
(2)若甲是乙的必要不充分条件,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a41689b3ffcbe366e39ba4cba1cf82.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
(2)若甲是乙的必要不充分条件,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】定义
为
个实数
,
,…,
中的最小数,
为
个实数
,
,…,
中的最大数.
(1)设
,
都是正实数,且
,求
;
(2)解不等式:
;
(3)设
,
都是正实数,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7f26cf36177a1f1a2531b44c54c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eede50660c662b097cc5dd35c6a46fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)设
![](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/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0376a00dee14dffcffe63c7b07ea3f.png)
(2)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd50728a3bfcda0c9b1ffae1741e2b2.png)
(3)设
![](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/5f7baca0a9943bbb354a0bef220f75dd.png)
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【推荐1】设关于x的不等式
.
(1)当
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对∀x∈R恒成立,求实数a的取值范围;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8ef30cdd663eaada3f2b5d3c0d5865.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51347a00ee8b99a365380d3be5abcc48.png)
(2)若原不等式的解中整数解恰有2个,求实数t的取值范围.
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3206965870982fe2c7113f796d93719.png)
(1)若
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(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ee160e966bead615d7c02ff313e903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4748413042efe964c3ac8c11fef26652.png)
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