1 . 设
为
的展开式中含
项的系数,
为
的展开式中二项式系数的和,则能使
成立的
的最大值是________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd5c7b7c7336cbd3cf32e0f107a45dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6deff1fd938c52e45f611c98b6265e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ed3999fc4190f50892439d4c1c35e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2670dcec327b205bb976c5a45d2c3f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2010·上海长宁·二模
2 . 已知
展开式中,各项系数的和与其各项二项式系数的和之比为
,则
等于_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b68f65cd6f3a9e914052f6d2baed239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332e71982612ea86c28b9f2054b1045c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次