1 . 已知等差数列满足
,则
的值为_____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb9b096249f3e1fcb773898885d4af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c0482b7c6b14cddfde05e23b5747ce.png)
您最近一年使用:0次
名校
2 . 已知
为等差数列,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e5dadfc7d9b12bea102cc0ce5bfcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf521ccf5dfea13a002630e8326f77d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
您最近一年使用:0次
2024-02-05更新
|
396次组卷
|
2卷引用:安徽省滁州中学2023-2024学年高二上学期期末测试数学试题
名校
3 . 在等差数列
中,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d4ff609697cb058b564c17fd61afd0.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a58019b1b2a7a79ba8ff7b782059abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d4ff609697cb058b564c17fd61afd0.png)
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4 . 等差数列
中,其前
项和为100,其前
项和为500,则其前
项和为______ .
![](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/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
您最近一年使用:0次
5 . 已知等差数列
单调递增且满足
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8531ca4f1a291d979885df7be4b5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
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解题方法
6 . 已知实数
成等差数列,在平面直角坐标系
中,点
,
是坐标原点,直线
.若直线
垂直于直线
,垂足为
,则线段
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab47bf43b2c5d6395129b80ddfbb1b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/975cf776eefef92d3ab30f40aee7b8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ffbd97467518d309bffa46df98f3fd4.png)
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2023-11-09更新
|
152次组卷
|
2卷引用:安徽省马鞍山市2023-2024学年高二上学期期中调研考试数学试题
名校
解题方法
7 . 记等差数列
的前
项和为
,已知
,
,则当
取最大值时,
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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95a1c9b86f4d0024c80b41a8cfea8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b750a3d196e80aa0bace56a14c930c17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2023-08-02更新
|
685次组卷
|
3卷引用:安徽省合肥市肥西县2022-2023学年高二下学期阶段性测试(期末)数学试题
名校
解题方法
8 . 设等差数列
,
的前n项和分别为
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9994bf38072d38dac46f2ddf729f025.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fa7b9ecd368d6d7980e5545e75c8a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9994bf38072d38dac46f2ddf729f025.png)
您最近一年使用:0次
2023-04-15更新
|
1557次组卷
|
8卷引用:安徽省淮南市兴学教育咨询有限公司2023-2024学年高三上学期第二次段考数学模拟试题
安徽省淮南市兴学教育咨询有限公司2023-2024学年高三上学期第二次段考数学模拟试题安徽省安庆市太湖中学2024届高三总复习双向达标12月月考调研卷数学试题辽宁省部分学校联考2022-2023学年高二下学期4月月考数学试题(已下线)专题4 等差数列的性质 微点2 等差数列前n项和的性质江西省赣州市六校联盟2022-2023学年高二下学期5月联合测评数学试题江西省吉安市永丰县永丰中学2022-2023学年高二下学期期末数学复习试题(已下线)第02讲 等差数列及其前n项和(十大题型)(讲义)-1辽宁省重点高中沈阳市郊联体2023-2024学年高二下学期4月月考数学试卷
名校
解题方法
9 . 已知数列
对任意正整数n都有
,且
是方程
的两个实根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ef843e7a813880292d75eb1e8f8ddc.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661eb98b215405edbdc6434ce55b89cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64da98bac77d031103679401d8989120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a440e08c7b9e8682ff493a3183072920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ef843e7a813880292d75eb1e8f8ddc.png)
您最近一年使用:0次
2023-02-18更新
|
538次组卷
|
2卷引用:安徽省宿州市泗县第一中学2022-2023学年高二下学期开学考试数学试题
解题方法
10 . 已知
,若
成等差数列,
成等比数列,则
的最小值是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1753f070cd6c99779719edba2bccc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42cfd16bb3415ca00ca97ff46371ea1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c5b538f692b31405c2e12a9b935e2.png)
您最近一年使用:0次