已知数列
为等差数列,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bdb06c52311e356c648fba054ad91c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb42578f654fb61e826026d2199751.png)
A.33 | B.44 | C.66 | D.88 |
更新时间:2024-06-02 06:27:29
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】首项为
的等差数列,从第10项起为正数,则公差的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4fd4507c507c55250a3a59e738dce9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知函数
是定义在
上的连续函数,且对
,
满足
,
,
.则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7b784381c282fc5f788485316c943c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af602661cecc9e69f6e89ea2e9bbb9c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b5320a6f673d6c2e70a815adaf2440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a9be228251278762249069a3a929e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16274ed3be91f1c9b7abe08990442cf.png)
A.5 | B.9 | C.4023 | D.4049 |
您最近一年使用:0次
【推荐1】已知数列
满足
,且
,则数列
的前18项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231a4eed6cdce517a7fca26eef054e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2c826e9e1b1ceff99b1d9ccc703ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知数列
满足
,前
项和为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4bd11e989a039e3c4a2c6236b1dcc.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/9b8d2f982ff948307bf22d309108b404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82eefb12529ed730adca549d198affe9.png)
A.1100 | B.1203 | C.1303 | D.1400 |
您最近一年使用:0次