1 .
是
与
的等差中项,
是
与
的等比中项,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b1b96f5050de3bc7ae53c7bf0c21e8.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b1b96f5050de3bc7ae53c7bf0c21e8.png)
您最近一年使用:0次
名校
2 . 若2、
、9成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
3 . 实数
,
满足:
,
,
成等差数列,
,
,
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
您最近一年使用:0次
2021-12-04更新
|
1102次组卷
|
3卷引用:四川省资中县第二中学2021-2022学年高三上学期11月月考文科数学试题
名校
4 . 已知
是等差数列的前
项,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efa0811300939fbe041b08f92a95d6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
您最近一年使用:0次
5 .
与
的等差中项是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143d1bd87c599dc3e971dd21702c0d5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be852dac60ca859a779d850327903ec.png)
您最近一年使用:0次
6 . 在等差数列
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fa69dde104dcf963e67647e801e0149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e85b39c5434fefdc035ee0329f2d4e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
您最近一年使用:0次
名校
7 . 设数列
,
都是等差数列,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a2e81424aaa101411f91f641a20018.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0088b4790b8775e728b08abfa61f0e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a8e032ad74dcd1939ff2b366b6a664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a2e81424aaa101411f91f641a20018.png)
您最近一年使用:0次
名校
8 . 等差数列
中,
,
,则
与
等差中项的值为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303d6d28672e079f7e6ee7131c0b73cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
您最近一年使用:0次
2020-08-24更新
|
1526次组卷
|
18卷引用:四川省成都市双流中学2018-2019学年高二下学期6月月考数学(文)试题
四川省成都市双流中学2018-2019学年高二下学期6月月考数学(文)试题四川省双流中学2019-2020学年高一下学期开学考试数学试题四川省成都市双流中学2019-2020学年高一(下)开学数学试题【市级联考】2019年湖北省武汉市高考数学(5月份)文科模拟 数学试题(已下线)第02讲 等差数列及其前n项和(练)-《2020年高考一轮复习讲练测》(浙江版)专题6.5 第六章 数列单元测试(测)【文】—《2020年高考一轮复习讲练测》(已下线)Q专题6.5 数列 单元测试(测)-江苏版《2020年高考一轮复习讲练测》2020届广东省佛山市禅城区高三上学期统一调研测试(二)数学(文)试题黑龙江省绥化市第一中学2019-2020学年高一下学期线上期中考试数学试题(已下线)专题11 等差数列和等比数列-2020年高考数学母题题源解密(江苏专版)湖北省武汉市2019届高三下学期五月训练题文科数学试题安徽省安庆七中2020届高三下学期仿真模拟冲刺卷(二)数学(文)试题(已下线)专题7.2 等差数列及其前n项和(讲)-2021年新高考数学一轮复习讲练测(已下线)专题5.5 《第五章 数列》单元测试卷(A卷基础篇)-2020-2021学年高二数学选择性必修第三册同步单元AB卷(新教材人教B版)云南省建水县第六中学2019-2020学年高二下学期期中考试数学试题(已下线)突破4.2.1 等差数列的概念重难点突破-【新教材优创】突破满分数学之2020-2021学年高二数学重难点突破(人教A版2019选择性必修第二册)苏教版(2019) 选修第一册 必杀技 第四章 4.2.1- 4.2.2 等差数列人教B版(2019) 选修第三册 必杀技 第五章 5.2.1 等差数列
9 . 已知等差数列
的前
项和为
,若
,则
=_______
![](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/a8d2035ae05e21ae00a883863521199f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da62fb1b88d79e7e4e05a488d78dd0f7.png)
您最近一年使用:0次
2020-03-04更新
|
533次组卷
|
4卷引用:四川省遂宁市2018-2019学年高一下学期期末数学试题
名校
10 . 已知正数
、
的等差中项为1,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f95987bc9d6eeb60224220cc9fcd58.png)
您最近一年使用:0次
2019-01-01更新
|
3537次组卷
|
8卷引用:【市级联考】四川省德阳市2019届高三“一诊”考试数学(文)试题