解题方法
1 . 已知等差数列
的前n项和为
,若
,
,则下列结论正确的是( )
![](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/358dd11daec9da39abfb97639bc199d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd992e992c9cd6bbb52043273cac6bb2.png)
A.数列![]() | B.![]() |
C.当![]() ![]() | D.![]() |
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解题方法
2 . 已知数列
的前
项和为
,则当
最小时,
的值为__________ .
![](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/74c1fedd137dee95bbd477fd22f2f493.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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3 . 已知命题
已知
,若数列
是递增数列,则
;命题
若
,则
的最小值是
,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ea9ac62b83d5dab5d974d149223d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fe2115d883d13561e28006d3f6143b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9286b3c6584b597aaf6db8849c6d3d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3062cfdd5c644248c420deb180a0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-12-02更新
|
188次组卷
|
4卷引用:陕西省榆林市府谷县府谷中学2022-2023学年高二上学期期中理科数学试题
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4 . 已知
,则数列
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb506fe847530520f5a0de5cb9e71d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.递增数列 | B.递减数列 | C.摆动数列 | D.常数列 |
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5 . 数列
的通项公式是
,则数列中的最小项是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaaad9bf88dfba5f725d0abad01bc2e.png)
您最近一年使用:0次
2020-10-11更新
|
194次组卷
|
2卷引用:陕西省榆林市第十二中学2020-2021学年高二上学期第二次月考数学试题