1 . 已知各项均为正数的等比数列
,满足
,若存在不同两项
使得
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3115a45296a1f6e64ac14851f15305ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2320fcc6aaa1d36b49f8e03b376b80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313c99ad28c4f0752babcc64d1325c3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd93ee03569849295ebde055410d1b84.png)
A.9 | B.![]() | C.![]() | D.![]() |
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2024-04-03更新
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2卷引用:陕西省宝鸡市2024届高三下学期高考模拟检测(二)文科数学试题
2 . 等比数列
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c3aed8080f03c6fbd5da85238278ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa3a7ce62e7bf557d9e1bf77c8dac0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
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3 . 已知等比数列
的前n项和为
,且
.
(1)求数列
的通项公式;
(2)若
,令
,求数列
的前n项和
![](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/24b351196ad42544f3f427f823c2146e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64734957a53307185890ebb40717af48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac07953530e3c248b3438fb200fb1661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68eee81e090b96819b7df54fc1bcc3a6.png)
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4 . 已知数列
,若
,且
.
(1)求证:
是等比数列,并求出数列
的通项公式;
(2)若
,且数列
的前项和为
,求证:
.
![](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/3998df04d0a8ded946c3f39d545fdc7e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1520ba20cafcdde8521151610fdce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50048f2ab3c89aa1dd2ddb75df35b47f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6fb121a57fa35e746f7746d12b67fb4.png)
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2024-01-14更新
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1302次组卷
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4卷引用:陕西省宝鸡市2024届高三上学期高考模拟检测(一)数学(文)试题
解题方法
5 . 已知数列
,若
,且
.
(1)求证:
是等比数列,并求出数列
的通项公式;
(2)若
,且数列
的前n项和为
,不等式
对任意的正整数n恒成立,求实数a的取值范围.
![](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/3998df04d0a8ded946c3f39d545fdc7e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1520ba20cafcdde8521151610fdce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50048f2ab3c89aa1dd2ddb75df35b47f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7349518966156f17a35256be6a81db9.png)
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6 . 等比数列
的各项均为正数,且
,
.设
,则数列
的前
项和
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4506a3a8b88b647f98f39a2fa52fd353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ffea7d31b0328117edd6dc6c37ed4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee89bc44e12319bd89ea386db0a371c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-12-06更新
|
1644次组卷
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8卷引用:陕西省宝鸡实验高级中学2024届高三上学期12月联考文科数学试题
陕西省宝鸡实验高级中学2024届高三上学期12月联考文科数学试题陕西省宝鸡实验高级中学2024届高三上学期12月联考理科数学试题(已下线)模块一 专题6 数列的通项公式与求和问题陕西省咸阳市咸阳中学2024届高三上学期第四次阶段测试数学(理)试题宁夏回族自治区2023-2024学年高二上学期期末测试数学训练卷(三)(范围:选择性必修第二册 4.1-5.2.2)(已下线)第06讲:数列求和 (必刷5大考题+5大题型)-2023-2024学年高二数学上学期《考点·题型·难点》期末高效复习(人教A版2019)(已下线)专题07 等比数列及其前n项和6种常见考法归类(3)(已下线)第四章:数列章末综合检测卷-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第二册)
名校
解题方法
7 . 已知
是等比数列
的前
项和,且
,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207122b4594b80a670136d5194f74ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6558d905dd2a035c8e22a343714a45f7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-07-15更新
|
1861次组卷
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6卷引用:陕西省宝鸡市陈仓区2023届高三二模文科数学试题
8 . 已知等比数列
中,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2815b24f5a89be7ae53aed93182e8988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c045ae70058a85ffa5356edeb8b612c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.8 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-09更新
|
469次组卷
|
2卷引用:陕西省宝鸡市渭滨区2022-2023学年高二上学期期末文科数学试题
解题方法
9 . 已知函数
,等比数列
的前n项和为
,数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
的首项为c,且前n项和
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a91d71e4955e783a6dcec4b20f1328.png)
.
(1)求数列
和
的通项公式;
(2)若数列
前n项和为
,求使
的最小正整数n.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b85ce87a18e34bac31262b91c80b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae6f317948c2030298d3ccb5a2a6af1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e8cdce8e670829c78a9194b4ce0da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a91d71e4955e783a6dcec4b20f1328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/855ce769f6795d1463744a0d74901fb7.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb3e89eb246882b10db78f800845c58.png)
您最近一年使用:0次
10 . 设等比数列
满足
,
.
(1)求
的通项公式;
(2)记
为数列
的前
项和.若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25fc6e4698a74a39097e891812c976ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de6e33f4455a10be635d52517a2df8b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3e6ff7cf0e15a8bfa8d5ea23a6d153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21aa969a94ed3af122e8a3c54252249c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2023-02-14更新
|
154次组卷
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2卷引用:陕西省宝鸡市渭滨区2022-2023学年高二上学期期末文科数学试题