1 . 已知数列
的首项
,
是
与
的等差中项.
(1)求证:数列
是等比数列;
(2)证明:
.
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fa65c121c7b361e141deaeee7a1d67.png)
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9卷引用:黑龙江省百师联盟2024届高三一轮复习联考(二)数学试题
黑龙江省百师联盟2024届高三一轮复习联考(二)数学试题甘肃省部分校2024届高三上学期10月质量检测数学试题(已下线)模块四 专题6 大题分类练(数列)基础夯实练(人教A)四川省宜宾市南溪第一中学校2024届高三上学期一诊考试理科数学模拟试题(已下线)第二篇 “搞定”解答题前3个 专题2 数列解答题【练】高三逆袭之路突破90分黑龙江省佳木斯市三校联考2024届高三上学期第三次调研考试数学试题(已下线)专题10 数列不等式的放缩问题 (7大核心考点)(讲义)(已下线)黄金卷08(已下线)题型18 4类数列综合
2 . 已知数列
的前n项和为
,且满足
.
(1)证明:数列
是等比数列;
(2)记
,数列
的前n项和为
,求证:
.
![](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/694469ac77ae7c840a2f206dc2b5da89.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e764296a62a7def78e39370f746b4663.png)
![](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/5cf49305249eb983fb10c95c2287d1ee.png)
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4卷引用:四川省2023届高三诊断性检测文科数学试题
四川省2023届高三诊断性检测文科数学试题四川省仁寿县铧强中学2024届高三上学期9月诊断性考试理科数学试题广东省揭阳市普宁市第二中学2023-2024学年高三上学期第一次月考数学试题(已下线)第二篇 “搞定”解答题前3个 专题2 数列解答题【练】高三逆袭之路突破90分
3 . 已知数列{
n}的前n项和是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fa34b92c437492a1050134089eb7f3.png)
(1)求证:数列
是等比数列;
(2)数列
的前n项和是
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fa34b92c437492a1050134089eb7f3.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f331591a8a32f3e781af90af3a53154.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2228a53178b3ce08e34591a209fba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
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名校
解题方法
4 . 已知数列
满足
,且
.
(1)证明:数列
为等比数列;
(2)记
,
是数列
前
项的和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b973cef9460d84bec30961a9d3443cd.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7bb5000adef715be512d2ce5ee66f9.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d54f55969c1a712dd52afc7121fdcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf4cea13f3c0a934a3be5a3d834774f.png)
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9卷引用:湖北省部分重点中学2020-2021学年高三上学期期末联考数学试题
湖北省部分重点中学2020-2021学年高三上学期期末联考数学试题(已下线)专题24 数列(解答题)-2021年高考数学(理)二轮复习热点题型精选精练(已下线)专题22 数列(解答题)-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题23 数列(解答题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)仿真系列卷(04) - 决胜2021高考数学仿真系列卷(江苏等八省新高考地区专用)(已下线)数学-2021年高考考前20天终极冲刺攻略(三)(新高考地区专用)【学科网名师堂】 (6月1日)重庆市第二十九中学校2021届高三下学期开学测试数学试题(已下线)预测07 数列-【临门一脚】2021年高考数学三轮冲刺过关(新高考专用)【学科网名师堂】(已下线)2024届数学新高考Ⅰ卷精准模拟(八)
5 . 已知数列
满足
,且
.
(1)证明:数列
为等比数列;
(2)记
,
是数列
前n项的和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3369ae2337f8d6a049fd8e5a9f313f87.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13430afc40fc85c8bb5b69065f878acf.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d865bfb7827bb824fc429ea9adf32722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf4cea13f3c0a934a3be5a3d834774f.png)
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解题方法
6 . 设数列
的前n项和
满足
,
,
,
(1)证明:数列
是等差数列,并求其通项公式﹔
(2)设
,求证:
.
![](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/735e9ae5c50cec64089cee8e8f2f634a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5572dd65d61abddd96dccb9e80e2892a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c590ebe4216924e5fe28062c5c9cdf92.png)
您最近一年使用:0次
2020-04-09更新
|
439次组卷
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2卷引用:2019届山东师范大学附属中学高考考前模拟数学(理)试题
7 . 已知数列
满足
,
,数列
满足
,
.
(1)证明:
为等比数列;
(2)数列
满足
,求数列
的前
项和
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b973cef9460d84bec30961a9d3443cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c94e7e73992aa9ff5b779b1d382671a.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7bb5000adef715be512d2ce5ee66f9.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4918e780861d676138eb35a9e7cb5c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d76c3eb0a07a827877d7a4dc306211.png)
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2017-04-08更新
|
1256次组卷
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2卷引用:2017届东北三省三校高三第二次联合模拟文数试卷
解题方法
8 . 如图,四边形ABCD是边长为2的正方形,E为边CD的中点,沿AE把
折起,使点D到达点P的位置,且
.
平面
;
(2)求三棱锥
的表面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06cb01443be899ef03dfe279af2ecfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53123d1ebece77f0405603fc35bd91f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da035673ef0edcfae6b72fb5e5ba34a.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea806939ab65af688284de59a21488c.png)
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9 . 记等差数列
的前
项和为
,
是正项等比数列,且
.
(1)求
和
的通项公式;
(2)证明
是等比数列.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738639bed93112168095c6e96df7c350.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae99a02a5fda4c6138f273f3e612ac48.png)
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解题方法
10 . 已知
是数列
的前
项和,
,
是公差为1的等差数列.
(1)求数列
的通项公式;
(2)证明:
.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4419a4be874934e045c20b37a79d13.png)
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2024-03-25更新
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3卷引用:2024年东北三省高考模拟数学试题(二)