1 . 记等差数列
的前
项和为
,若
,
,且
,
,
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b159beb781ae199822830792c9abb442.png)
__________ .
![](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/4bd67cf18bd35149475d35f1c603ad59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c9b5080aa2e9c889aac8e378d83dfee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e1909c50273f078a25c405bb0bc16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e222ca706f1d234beb0d88206bc8d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba38c5263fb62282ce36d0c313aa849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b159beb781ae199822830792c9abb442.png)
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2 . 已知
成等比数列,且1和4为其中的两项,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
A.2 | B.![]() | C.![]() | D.![]() |
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3 . 已知数列
中,
,
,且
、
是函数
的两个零点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9efeb4455e30293d412938eeea85d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6884e70ee97233ed4a1f21ad91411c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e84c30444f13d37ada78285dc4f83b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30113c707fe8ece915924f1667b953d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
您最近一年使用:0次
名校
解题方法
4 . 已知数列
为等比数列,
是函数
的极值点,设等差数列
的前
项和为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3480c1588d7838fbc46aea96694fc76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3325fab2431cce632f9996535830b12e.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5197b42eaed016ae0c960b6d91bb917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f62fd7ee3ffe0f17e6590d56444d5b8.png)
A.![]() ![]() | B.![]() | C.![]() | D.2 |
您最近一年使用:0次
2023-04-26更新
|
643次组卷
|
3卷引用:四川省遂宁市2023届高三三诊考试数学(理)试题
5 . 已知等差数列
的前
项和为
,
,
,
,
成等比数列.
(1)求
的通项公式;
(2)求数列
的前
项和
.
![](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/6ae55f2aaaca03646ea3e64f15afb5d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549980ea98031b87af7a207b879d5ba1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-04-20更新
|
907次组卷
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4卷引用:广东省梅州市2022-2023学年高二下学期期中数学试题
6 . 已知
,向量
与向量
垂直,
,
,2成等比数列,则
与
的等差中项为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c328c9c4ec69c4275e27576fb61655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cee654c7591d3a2d7422bf3166c7416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59e01cd60a237a65953f4e24cf94c81.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.![]() | B.![]() | C.![]() | D.1 |
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2023-04-14更新
|
616次组卷
|
3卷引用:陕西省西安市临潼区、阎良区2023届高三一模理科数学试题
名校
7 . 记
为数列
的前n项和,若
,且
,
,
成等比数列,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2180801cb6bd964133351fe5e7cd78e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
A.![]() | B.![]() |
C.![]() ![]() ![]() | D.![]() |
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2023-04-14更新
|
399次组卷
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2卷引用:福建省福州第一中学2022-2023学年高二下学期第三学段模块考试(期中)数学试题
名校
8 . 已知公差不为零的等差数列
满足:
,且
成等比数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0bfa56250f5308110c2e9add97e0fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b1b845916a4b6a18cdfbcd308d09c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5eb9b8f893dd71876349ad40724550.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-04-13更新
|
2268次组卷
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12卷引用:浙江省台州市2023届高三下学期4月第二次教学质量评估(二模)数学试题
浙江省台州市2023届高三下学期4月第二次教学质量评估(二模)数学试题(已下线)专题04 数列广东省梅州市梅江区梅州中学2023届高三冲刺热身数学试题广东省深圳市福田区红岭中学2023届高三第五次统一考数学试题江苏省盐城中学2023届高三三模数学试题江西省上饶市民校考试联盟2022-2023学年高二下学期阶段测试(四)数学试题山东省济南市历城第一中学2023届高考押题卷(二)数学试题新疆维吾尔自治区伊犁哈萨克自治州2022-2023学年高二下学期期中数学试题江苏省镇江市镇江第一中学2024届高三上学期12月阶段测试数学试题河南省漯河市实验高级中学2024届高三上学期1月阶段模拟测试数学试题(已下线)专题10 数列小题(已下线)专题6.2 等比数列及其前n项和【十大题型】
名校
9 . 已知实数列
、
、
、
、
成等比数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b11714ea4eb3fd2349854ff2c96b4f9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-03-30更新
|
1154次组卷
|
6卷引用:天津市河西区2022-2023学年高二上学期期末数学试题
解题方法
10 . 已知等差数列
的前n项和为
,若
成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
________ .
![](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/926f4384fc6bf0f0b2737ac9ab5668f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
您最近一年使用:0次