设等差数列
的前
项和为
,则“
,
”是“
的最大值为
”的( )
![](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/fb23a0aa533fe2f67a50551bb7772ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95a1c9b86f4d0024c80b41a8cfea8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48e81b54f78b96294295542b010dfb.png)
A.充分必要条件 | B.充分不必要条件 |
C.必要不充分条件 | D.既不充分也不必要条件 |
21-22高三上·内蒙古赤峰·期末 查看更多[2]
更新时间:2021-02-15 21:11:36
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】若
,
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a5f72f5c0e3799572190b12c396246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65820d0b1ee4d4c9e635e99299af6ae7.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 |
您最近一年使用:0次
单选题
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较易
(0.85)
名校
【推荐2】“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260c314b327680c019f079a3702e86f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43873357b014c7ee9fdedb7562dfda07.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 |
您最近一年使用:0次
单选题
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较易
(0.85)
名校
【推荐1】已知公差不为0的等差数列
的前n项和为
,若
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f5671e909d92af76185331dc47dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.-18 | B.-105 | C.-14 | D.-108 |
您最近一年使用:0次
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解题方法
【推荐2】已知
为等差数列,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8afdbd9ef4f7a6d9d87524cb0d2f862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
A.2 | B.3 | C.12 | D.不能确定 |
您最近一年使用:0次
单选题
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较易
(0.85)
【推荐1】设数列
是等差数列,且
,
,
是数列
的前n项和,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dd9f1aa69c9e59b5ead13060c171e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f0d72389212c3ce5007129c79ead8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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较易
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名校
【推荐2】已知
是等差数列
的前
项和,且
,
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47fb10a18c5a643b4133d4576dd13051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b499db552a74e4d609391271dcf72ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75abc985d1a19ef68bf02232b455ff72.png)
A.数列![]() | B.![]() |
C.![]() ![]() | D.![]() |
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