化简
的步骤如下:原式
,上述解题过程中用到的依据有①约分;②合并同类项;③同分母分式的加减法则;④通分,排序正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045c53bd07292183cef8c3ad9a3ff13c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7127d4c3f63928507a48cf9c06dd94.png)
A.①②③④ | B.③②④① | C.④③②① | D.④②③① |
更新时间:2022-04-09 18:01:48
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