名校
解题方法
1 . 不经过第四象限的直线
与函数
的图象从左往右依次交于三个不同的点
,
,
,且
,
,
成等差数列,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4c6592bbbee1498da630bd431299fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132668fc41c8266ba917dc5b4995c6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0a4d02005ed2c048b59856ad98c030.png)
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2024-05-14更新
|
219次组卷
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2卷引用:江西省景德镇市2024届高三第三次质检数学试题
名校
解题方法
2 . 在
中,
,
,
依次成等差数列,
,
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d4cbfc00ff1b4016bc51b6704f6c42.png)
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2024-05-08更新
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958次组卷
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2卷引用:江西省上饶市2024届高三第二次高考模拟考试数学试卷
名校
解题方法
3 . 若互不相等的正数
满足,则
成等比数列( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23134d0865490319d4f28e9acd118911.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 等比数列
的公比为
,且
成等差数列,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a0d6d97747503a060cad827fa4a12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77c91fdcc48a8a9b80dddad022d8cc5.png)
A.![]() | B.若![]() ![]() |
C.若![]() ![]() | D.![]() |
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2024-05-02更新
|
357次组卷
|
3卷引用:江西省南昌市第十九中学2024届高三下学期第五次模拟考试数学试卷
名校
5 . 记
,
分别是数列
,
的前
项和,
,
是等差数列,且
.
(1)若
,
,求
的通项公式;
(2)若
为等差数列,且
,求
.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e71ea4f1cf744437f385dbb8bd420fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1381f0937c6052ce088e0eaee7df4880.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34c463105463ba91ad2f3472ef24e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6428dce66561419790580a8d1df5fdb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc49c7a6cf6044252bd55ee240b346e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
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6 . 设某直角三角形的三个内角的余弦值成等差数列,则最小内角的正弦值为( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-14更新
|
1961次组卷
|
4卷引用:江西省南昌市第十九中学2023-2024学年高三下学期第一次模拟考试数学试卷
7 . 已知等比数列
的首项
,公比为
,
的
项和为
且
,
,
成等差数列.
(1)求
的通项
:
(2)若
,
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3783e69ef5a6a0af566ff4e21ccf03.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/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9eeeea0a80744f6fc98376b5e12ddc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccfebfa207e3b95eb658c00f489c4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
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8 . 已知数列
是等差数列,数列
是等比数列,
,且
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3ee4c29f6c9cd0fddc596d3e8ab877.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/647dd419219c99c54dd6e918def29b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94524fd24414d0e5d1f2759ac5155aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3ee4c29f6c9cd0fddc596d3e8ab877.png)
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2024-01-11更新
|
576次组卷
|
3卷引用:江西省赣州市南康中学2024届高三上学期七省联考考前数学猜题卷(八)
名校
解题方法
9 . 已知数列
的各项均为正数,
满足
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d048849a2c08bcf87d80ab7c98a3ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2849e8da76332a6a0f4e3d6d68bf3b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-04-26更新
|
340次组卷
|
10卷引用:江西省南昌市新建区第二中学2024届高三上学期8月开学学业水平检测数学试题
江西省南昌市新建区第二中学2024届高三上学期8月开学学业水平检测数学试题浙江省温州市2023届高三下学期5月第三次适应性考试(三模)数学试题江苏省无锡市辅仁高级中学2023届高三下学期高考前适应性练习数学试题江苏省南京市金陵中学2023-2024学年高三上学期10月检测数学试题(已下线)专题10 数列小题(已下线)专题6.1 等差数列及其前n项和【九大题型】(已下线)FHgkyldyjsx19(已下线)广东省深圳中学2024届高三下学期二轮三阶段测数学试题广东省广雅中学2024届高三下学期高考考前适应性考试数学试题湖北省黄石市部分学校2023-2024学年高二上学期12月阶段性训练数学试题
名校
解题方法
10 . 已知正项数列
满足:对任意正整数
,都有
成等差数列,
成等比数列,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e719bd380ea9dd3ec2a20242bdf6380.png)
(1)求证:数列
是等差数列;
(2)设数列
的前项和为
,如果对任意正整数
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0197eeeeaafec6b1fdd7bb8509572f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a20dfd9c14d834c66b2070c41f66eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b55761181faa05961286eedfebca4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e719bd380ea9dd3ec2a20242bdf6380.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4f93dca4192c87d1ac77a2456bf12e.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b01041691ad489f126f05c18ea8f0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd0dc83494c84b81687cf8c38736b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2024-01-25更新
|
437次组卷
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3卷引用:江西省上饶市广丰贞白中学2024届高三上学期1月考试数学试题