已知数列
满足
,
(
),则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3998df04d0a8ded946c3f39d545fdc7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28652e52c0b02a343e618935ea625cbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
A.![]() | B.![]() | C.7 | D.12 |
更新时间:2022-03-24 11:22:59
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】若数列{an}满足an+1=
,a3=3,则a2 024=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a18d380bae936120ed037b2a4b745a4.png)
A.-![]() | B.![]() |
C.![]() | D.3 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】平面上10个圆将平面分成区域的个数的最大值为( )
A.88 | B.90 | C.92 | D.以上答案都不对 |
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】已知数列
的前
项和为
,
,若存在两项
,
,使得
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8370a173854471a3eb27637993a3d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ba1c5bd4befa16725f99a040435823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfaae40629f480827037653562fa87f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐2】构造数组,规则如下:第一组是两个1,即
,第二组是
,第三组是
,…,在每一组的相邻两个数之间插入这两个数的和得到下一组.设第n组中有
个数,且这
个数的和为
.则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29343388ca8b33dc98325e65382b38a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bba32cb3e19ab13f579c01e0d3b02bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672eade66d216b1533946ad98eca77f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9e0490a0d021ff5eb6bddd42e02307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78d551e6cc415f570dc7fc49b825cb1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次