1 . 方程
的三个根1、2、3将数轴划分为四个区间,即:
,
,
,
.我们在这四个区间上分别考察
的符号,从而得出不等式
的解集为
.
(1)直接写出不等式
的解集;
(2)直接写出不等式
的解集;
(3)一般地,对
,且
,试求出不等式
的解集.(需要写出计算过程)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0cac5cb7faaf5205492ebbc2e5ca7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4280adea02588850b0a1af4844fcea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d3856e530822adb5ee97d1be8c1bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7fbc72c5209768a807ddf0632ba737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86987ba3d628de2af5b17097c0cce39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aff6c47b529aea1d2a8c3d5cbbaabb8.png)
(1)直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ec672288394b1cdaa3e775fad1e624.png)
(2)直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110b8d4525b6f8dc249019e1321a1f53.png)
(3)一般地,对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba52b83692341058fa9c6df426775491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245f5c334fa1dd8ce6a6d855c480276a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9034feecc35e8cc51b5fac2eea3c92.png)
您最近一年使用:0次
名校
解题方法
2 . 阅读本题后面有待完善的问题,在下列三个条件①
,②
,③
中选择一个作为条件,补充在题中横线标志的___________处,使问题完善并成立,并解答你构造的问题.(如果选择多个关系并分别解答,在不出现逻辑混乱的情况下,按照第一个解答给分).
已知实数
,命题
,命题
___________,使得
是
的充分不必要条件成立,求此时
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed38cde5c3a0314f5ab26022895d0aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f892dbaa1fd62c65d14b9b070d46b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f84561f72fb6d1ae0a4a5577ce33408.png)
已知实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9833dfc0ebf89285f5f5931d46709f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.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/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次