![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfae3d32d7bac1f07303d814f2c40b9.png)
A.![]() | B.![]() | C.3 | D.-3 |
更新时间:2020-08-06 18:35:08
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【推荐2】下列说法①若
,则a、b互为相反数;②若a、b互为倒数,则
;③若
,则a、b均大于0;④若
,则a一定为正数,其中正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cdea1e995c59e5d3225acad8b4d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca27cc54ca0332245f5167488daa3408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d5f0d374837655cc286d326305da36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e3ab57dac25b6c513c950e7b9bb356.png)
A.①④ | B.①② | C.①②④ | D.①③④ |
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