1 . 已知圆
,若圆
的过点
的三条弦的长
,
,
构成等差数列,则该数列的公差的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbfe66995550a584f699195a490bb95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4792620bc9322ef5b1767609c6db1742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
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2022-02-18更新
|
562次组卷
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4卷引用:江苏省徐州市2021-2022学年高二上学期期末数学试题
名校
解题方法
2 . 设数列
满足
,
,
,
,则满足
的
的最大值是___________
![](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/159847b00a04e4f10791c4c4c9e5fe92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0b29d2e24311e3c672ec796d28b385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002d5545501ce7abd64ed6999e999575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2021-12-25更新
|
538次组卷
|
2卷引用:江西省景德镇市第一中学2022届高三12月月考数学(理)试题
解题方法
3 . 记等差数列
的前
项和为
,满足
,
,则
的最小值为_________ .
![](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/a0e65d2e6720cc386bdbea11981c97f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f9744f7b92af7046f9f162c080ef20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce18c8141a58131ecc71e0148088843.png)
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4 . 一个三角形的三个内角
成等差数列,其三边
也成等差数列,则该三角形的形状为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
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5 . 在等差数列
中.(1)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5d2c6282df9bd122ad3b2830cfb40c.png)
_________ ;(2)已知
,前11项的平均数是5,若从中抽取一项,余下10项的平均数是4,则抽取的一项是第________ 项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09294192b406961e5abc748583b3b7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5d2c6282df9bd122ad3b2830cfb40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc759e6f45cff8dacef4206490e98a3.png)
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6 . 等差数列
、
满足对任意
都有
,则
=_______________ .
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca938e31f7f870b16928c96c3bd544a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4613dc3182052729d7931e133b50b1e7.png)
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2018-08-11更新
|
1027次组卷
|
3卷引用:【全国百强校】黑龙江省哈尔滨师范大学附属中学2017-2018学年高一下学期期中考试数学试题
【全国百强校】黑龙江省哈尔滨师范大学附属中学2017-2018学年高一下学期期中考试数学试题(已下线)第四章++数列2(能力提升)-2020-2021学年高二数学单元测试定心卷(人教A版2019选择性必修第二册)人教A版(2019) 选修第二册 数学奇书 第四章 数列 4.2 等差数列 4.2.1 等差数列的概念 第2课时 等差数列的性质