解题方法
1 . 求不等式的解集(写出必要的过程)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35555979ecc0abb9ce17e2fc8eacc44.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35555979ecc0abb9ce17e2fc8eacc44.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b04398439d2a7867cf0a413edd40383.png)
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2 . 设a、b、c、p为实数,若同时满足不等式
、
与
的全体实数x所组成的集合等于
.则关于结论:①a、b、c至少有一个为0;②
.下列判断中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2f84c4c975416035f8cad81c16c7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745f264b3306dc539570ba4fd9748007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913adf326c389a213d6cfebc4f2258e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d9880afb9e2262dbfcf20235e85a62.png)
A.①和②都正确 | B.①和②都错误 |
C.①正确,②错误 | D.①错误,②正确 |
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3 . 已知
,
,给出下列集合:①
;②
;③
;④
,则关于
的不等式
的解集可能为_____ .(填入所有可能情况的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811f36e5cea731c0533aa94c90dead2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9d2af50f2cec7f42ff2de7bfb117ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f6eca6c1e42804f913868467bf128b.png)
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4 . (1)不等式
的解区间的长度是多少?
(2)如果数集
,
都是集合
的子集,那么集合
的长度的最小值和最大值分别是多少?(直接写出答案)
(3)已知实数
,求满足
的
构成的区间的长度之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e1bcced697608aa2a6c6afcc181da7.png)
(2)如果数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c329264519d5768fb5656830527b37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb608a8ee8e52d4f20e32611bc7176ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(3)已知实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9795eba7db63c2bbec7166b354163e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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