当
时,将三项式
展开,可得到如图所示的三项展开式和“广义杨辉三角形”:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ccb6deec8276b614f45fbbfc9e41be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b542111980fc8adc063f88005d08dd84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2521d0d64b2308fa4da33c753e5912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5a339c13146f0fe62990b5cac1fe8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ae80be001f6b9fad16c828a7120f40.png)
...
的展开式中,
的系数为75,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ec1e39456a1ab2a93307e9b1652fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ccb6deec8276b614f45fbbfc9e41be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b542111980fc8adc063f88005d08dd84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2521d0d64b2308fa4da33c753e5912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5a339c13146f0fe62990b5cac1fe8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ae80be001f6b9fad16c828a7120f40.png)
...
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87c0fd8f1990b6de9cc2016bbf64d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be56e9bad873ec62fa3319414edcdfd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.1 | B.![]() | C.2 | D.![]() |
更新时间:2024-05-24 23:02:10
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】
的展开式中含
的项的系数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1956158c8c3ed0a5f60b98885886f1b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
A.-1560 | B.-600 | C.600 | D.1560 |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知
)的展开式中第三项与第五项的系数之比为
,则展开式中常数项是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f270def14ab99e6de8bb54dd5877a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76433c2ae8d071413d7d8e93735ba07a.png)
A.45 | B.8 | C.28 | D.6 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】若
的展开式中含
项的系数为10,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe53eaffa6085c1bb069afba4da52762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】在
展开式中,含
的项的系数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53768487404b508c1c824c9fb4ad8062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3336c8ed5361c10c37300e41e03f9f2f.png)
A.220 | B.-220 | C.100 | D.–100 |
您最近一年使用:0次