计算:
=__________ (要求结果用正整数指数幂表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73c46ff79c02ac81f52a51532256591.png)
更新时间:2020-04-08 07:39:14
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【推荐1】(1)(-2x
·y
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=_______ (2)(a·a
·a
)
=_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708845c377fa64e861e262aedce18319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708845c377fa64e861e262aedce18319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921ef5abce73648e3834140df9a72aa8.png)
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