已知
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30454b2f3da584f9033e5409ce6da83.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8307d4b94e81794d6fb6ab6cc9823275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8aaf70c40bb6e0312e97ce92d419c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30454b2f3da584f9033e5409ce6da83.png)
2015·陕西西安·一模 查看更多[2]
更新时间:2016-12-03 14:59:10
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,则二项式
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