名校
1 .
的展开式中,
的系数是_____________ .(用数字作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c559691c86018fcb69953129a2afad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
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2018-01-02更新
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627次组卷
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3卷引用:甘肃省天水市第一中学2017-2018学年度下学期高三第二次模拟 考试 数学(理科)试题
2013·甘肃·二模
2 . (2x+
(2x-
5的展开式中各项系数之和为3,则该展开式中常数项为
![](https://img.xkw.com/dksih/QBM/2013/6/14/1571245095378944/1571245100818432/STEM/1074d4a220d64de2bed30cd21dacece8.png)
![](https://img.xkw.com/dksih/QBM/2013/6/14/1571245095378944/1571245100818432/STEM/65cd4b91f97e449f9d1ec74163882115.png)
A.40 | B.160 | C.0 | D.320 |
您最近一年使用:0次
名校
3 . (1)
的展开式中,求
的系数;
(2)已知
的展开式中含
的项的系数为
,求
的值;
(3)
的展开式中各项系数的和为
,求该展开式中的常数项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db435a9f009da9fbccf258b6dcb301a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1b0efe8c9507de321dacc637490bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29df14e65ca0096f81aed15568652d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a3646a75400d240423f00388477e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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