已知等差数列
的公差为
,前
项和为
,则“
”是“
”的( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.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/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a484d633ca9b88dc4c0779142f4dd469.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
更新时间:2024-05-23 09:17:15
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】下列命题是假命题的为
(1)常数数列既是等差数列也是等比数列;
(2)已知
,
,
,则
;
(3)在
中,“
”是“
”的充分不必要条件;
(4)若函数
在
上存在单调增区间,则
.
(1)常数数列既是等差数列也是等比数列;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f20dc732e23cc35ca2e81714aa8b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436e1bcfb7ff76cc00aba3b2501ea7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1598f01e7939fa901cd0a9304ca78f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905da1e859352b2692bce3a3ea45667c.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083257dc06bb36d4cff5309afeae2ff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069390dd908ff203327958117a226593.png)
(4)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97e9db2117d5c8dec0377e3162df420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd5bd4678f4aca10c1625aaf600d982.png)
A.(2)(3) | B.(1)(2)(3) |
C.(1)(2)(4) | D.(1)(2)(3)(4) |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知a,
,“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610f9a1bc18bed042d4e587e306775fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ffd9393843c47eeeb03e4140e7ca3e.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】已知等差数列{
}的前n项和为
,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0709f900e5c2aff6408e5e9e9d4a035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b2b18359ce29c35b0eb1b005f1ebe4.png)
A.7 | B.8 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】等差数列
的首项
,它的前
项的平均值为
,若从中抽去一项,余下的
项的平均值
,则抽出的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc759e6f45cff8dacef4206490e98a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94bcf13a13d3b53211e44a6def1d4250.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次