设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8649d69dd78e2efc84dafdad26bde9.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7b22cb69baf0ada26933fd54095ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8649d69dd78e2efc84dafdad26bde9.png)
更新时间:2018-06-02 10:48:19
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【知识点】 二项展开式各项的系数和解读
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