1 . 若
的二项展开式中各项的二项式系数的和是
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f295c62ec9dfd765b13c30071b6de740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332e71982612ea86c28b9f2054b1045c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
2 .
的展开式中第6项与第7项的系数相等,则展开中各二项式系数的和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac13369db3a6cd9c7f4b923e334d0c0d.png)
A.64 | B.128 | C.![]() | D.256 |
您最近一年使用:0次
名校
3 . 二项式
的展开式的二项式系数和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377e832461879f3fe0fe01db5a39dce1.png)
A.1 | B.-1 | C.![]() | D.0 |
您最近一年使用:0次
4 .
的展开式中,各项系数之和为
,各项的二项式系数之和为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6a4f3630a8109e5e168fdf3a3a4999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099ae34f2c9a030c168152ac76ce4baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.5 | B.6 | C.7 | D.8 |
您最近一年使用:0次
5 . 已知
的展开式中各项的二项式系数和为
,第二项的系数为
.
(1)求
,
;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a28ebcae373876112a8feabccdff63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
解题方法
6 .
的二次展开式中,所有项的二项式系数之和为256,则展开式中
项的系数为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707b986710b28ae7de5ea6f8265201a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3336c8ed5361c10c37300e41e03f9f2f.png)
您最近一年使用:0次
2017-02-08更新
|
793次组卷
|
3卷引用:2017届云南大理州高三理上学期统测一数学试卷
7 . 在
的展开式中,各二项式系数的和为
,则常数项是_______ .
![](https://img.xkw.com/dksih/QBM/2016/11/4/1573124229095424/1573124235264000/STEM/bbefae5c991b4a08b3760f000f9cf8bd.png?resizew=81)
![](https://img.xkw.com/dksih/QBM/2016/11/4/1573124229095424/1573124235264000/STEM/73176a537ba143e69c3015c97e8a4f8a.png?resizew=27)
您最近一年使用:0次
8 . 设
的展开式的二项式系数和为64,则展开式中常数项为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720663d4e3f994215a9e93bf101d54a1.png)
您最近一年使用:0次
2016-12-04更新
|
932次组卷
|
3卷引用:2015-2016学年福建师大附中高二下期末数学(理)试卷
9 . 已知
的展开式中二项式系数之和为128,则展开式中
的系数为____________ .(用数字作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cffce15fe407f3188813c8b2b4615f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2016-12-04更新
|
581次组卷
|
5卷引用:2016届山东省实验中学高三第一次模拟理科数学试卷
10 . (1)设复数
满足
,且
为纯虚数,求
;
(2)已知
的展开式中所有二项式系数之和为
,求展开式的常数项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70c2519610d6d1d6d0855b0f27dfc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c7899d615dde1faacdde99cbe1438c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fcfebd9f5a57036e6df6b6e14865da3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2528d5ce5ef103be9d578af43b0febfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332e71982612ea86c28b9f2054b1045c.png)
您最近一年使用:0次