1 . 比较两个实数大小
两个实数的大小是用实数的运算性质来定义的,有:
__________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8eeaf3726cb66fdcf397325503b8bb.png)
__________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0496a699802e3d531b7f25687bb5e2.png)
____________
另外,若
,则有
;
;
.
两个实数的大小是用实数的运算性质来定义的,有:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96753485da057c182d05d56917b55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8eeaf3726cb66fdcf397325503b8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0496a699802e3d531b7f25687bb5e2.png)
另外,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25747252e57c76fc56f60be6eecfada9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71599f6749e42bdc3c09cfd5002c0fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab6c2cbac488e50397e23b703a78d144.png)
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2022-08-23更新
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2卷引用:【导学案】3.1不等式性质课前预习-北师大版2019必修第一册第一章预备知识