已知
是二次函数
图象上的一系列点,其中
,记
(n为正整数),令
,则S的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb1b052b4fbeab908e1e3d4a2903f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5109eb35b9c16fc5e128198a1819a44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f74cba0f2dcda7e483808b7aaaabb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c414502a9d5420715cb39e6fc2d64c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeaeefb8d052ab78155b326f7392555d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-12-27 11:57:51
|
【知识点】 数与式
相似题推荐
单选题
|
适中
(0.65)
【推荐1】若实数m、n满足等式
,且m、n恰好是等腰△ABC的两条边的边长,则△ABC的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050ea707b97d2d0e416d3373b0432ed5.png)
A.6 | B.8 | C.10 | D.8或10 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】我国南宋数学家杨辉用“三角形”解释二项和的乘方规律,称之为“杨辉三角”,这个“三角形”给出了
的展开式的系数规律(按a的次数由大到小的顺序)
1 1![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e601e5001c5bdb76028516156040fa40.png)
1 2 1![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d351a97edcc0783d8d7a02d041bdb5.png)
1 3 3 1![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee85d22b9fd3c1afea0688617132365.png)
1 4 6 4 1![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c497e36c29a7f7bd6a954a707fbea3.png)
… …
请依据上述规律,写出
展开式中含
项的系数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5bea0e9f78d203efc931b1b829f814.png)
1 1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e601e5001c5bdb76028516156040fa40.png)
1 2 1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d351a97edcc0783d8d7a02d041bdb5.png)
1 3 3 1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee85d22b9fd3c1afea0688617132365.png)
1 4 6 4 1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c497e36c29a7f7bd6a954a707fbea3.png)
… …
请依据上述规律,写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088dbf0ecdf308717cf29162817ee77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc238a0e4a1837f5c168ab7602124252.png)
A.-2021 | B.2021 | C.4042 | D.-4042 |
您最近一年使用:0次