1 . 已知数列
满足
,
.
(1)证明:数列
为等比数列.
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164659e154e10c13694e2f4a36a3d3e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f19112256c661c47057ae72962a3a2a.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd7fe32cbbf55c0ef0edbfb99b31a55.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d1de52d5b738dd058b8afb7e77f337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
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2022-01-16更新
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6卷引用:贵州省黔西南州2021~2022学年高二上学期期中考试数学(理)试题
贵州省黔西南州2021~2022学年高二上学期期中考试数学(理)试题河南省南阳地区2021-2022学年高二上学期期中热身摸底考试数学试题河南省南阳市第一中学校2021-2022学年高三上学期第一次网上训练数学(文)试题(已下线)专题二十 数列求和(已下线)专题27 数列求和-3(已下线)第7讲 数列求和9种常见题型总结 (3)
解题方法
2 . 执行下边的程序框图,输出的![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c7e7449010436e00dce3b6924a4258.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c7e7449010436e00dce3b6924a4258.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874693256003584/2880273391026176/STEM/cd591f5c-18dd-45fd-b865-48666f7f9c56.png?resizew=145)
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名校
解题方法
3 . 已知等比数列{an}中,a1=1,且2a2是a3和4a1的等差中项.数列{bn}满足b1=1,b7=13,且bn+2+bn=2bn+1.
(1)求数列{an}的通项公式;
(2)求数列{an+bn}的前n项和Tn.
(1)求数列{an}的通项公式;
(2)求数列{an+bn}的前n项和Tn.
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2021-09-25更新
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16卷引用:贵州省六盘水红桥学校2021-2022学年高二上学期期中考试数学试题
贵州省六盘水红桥学校2021-2022学年高二上学期期中考试数学试题(已下线)河南省部分学校2020-2021学年高三下学期开学检测数学(文科)试题(已下线)河南省部分学校2020-2021学年高三下学期开学检测数学(理科)试题神州智达省级联测2021-2022学年高三上学期第一次考试数学试题河北省省级联测2022届高三上学期第一次考试数学试题江苏省震泽中学2021-2022学年高二上学期十月月考数学试题陕西省安康中学2021-2022学年高二上学期第一次月考数学试题黑龙江省大庆市让胡路区大庆中学2021-2022学年高二上学期期末数学试题陕西省渭南市韩城市新蕾中学2021-2022学年高二上学期期中文科数学试题1.3等比数列检测题 A卷(基础巩固)1.3等比数列检测题 B卷(综合提升)(已下线)2022年高考考前最后一课-数学(正式版)-2022年高考数学(文)终极押题卷浙江省杭州市第四中学吴山校区2021-2022学年高二下学期期中数学试题甘肃省白银市会宁县会宁县第四中学2022-2023学年高二上学期期中数学试题安徽省合肥市庐江县2022-2023学年高二下学期开学考试数学试题四川省泸州市叙永第一中学校2023-2024学年高二上学期期末数学试题
4 . 已知数列
满足
,
.
(1)求证数列
是等比数列;
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0248acaec9ab99d06661bdd7f1eb4f.png)
(1)求证数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d483eb4433fee05a5810a276433b1742.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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5 . 已知
为等差数列
的前
项和,且
,
;
为等比数列
的公比,且
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbe18f5f93f2b31baf75766273a151.png)
(1)求
.
(2)设
,记数列
的前
项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d7a6ec3e272d86d2a0f07db9ee1b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535fd9605b90ac7f0fed6025be9f851f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbe18f5f93f2b31baf75766273a151.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d3c0e668468adc3108c788cf701b9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
6 . 已知数列
满足
,且
.
(1)若
,证明:数列
是等比数列.
(2)求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac965bbc35f1d2f1502156956c550a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30bfb61584dc78a6142da538376ec274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](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)
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2021-09-12更新
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1314次组卷
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4卷引用:贵州省瓮安第二中学2020-2021学年高一下学期第一次月考数学试题
名校
解题方法
7 . 已知数列
满足
,
.
(1)计算
,猜想数列
的通项公式并给出证明;
(2)令
,设数列
的前n项和为
,求使不等式
成立的n的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb59c9f271200ad4757c483fc54631f.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38bb15b6cd15d0f46fe96bc86ae488d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996f63ba92089fe9544ff612a1852a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
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解题方法
8 . 数列
中,
,
,记
为
中在区间![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105835ef2db90df2f3b32d39ba243905.png)
中的项的个数,则数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff613c05fa26ee1878d6981008d77cd9.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88df29879b4e4f9e412a5a49d262b8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105835ef2db90df2f3b32d39ba243905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4510bacdfd0023b9146eb500f8ca26ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c320a0619c63a5b650a1a94c0a5679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7afc6e67a875ed2eb889e950a77715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff613c05fa26ee1878d6981008d77cd9.png)
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2021-08-28更新
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5卷引用:贵州省六盘水红桥学校2022届高三适应性月考数学(理)试题
贵州省六盘水红桥学校2022届高三适应性月考数学(理)试题云南省师范大学附属中学2022届高三高考适应性月考卷(二)数学(理)试题云南省师范大学附属中学2022届高三上学期高考适应性月考卷(二)数学(理)试题(已下线)第03讲 等比数列-【帮课堂】2021-2022学年高二数学同步精品讲义(苏教版2019选择性必修第一册)广东省梅州市梅江区梅州中学2024届高三上学期第一次月考数学试题
名校
解题方法
9 . 设等比数列
满足:
,
,记
为
中在区间![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf8823613e6b620b2891a4c06e4b707.png)
中的项的个数,则数列
的前50项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b024dcba89b9bc12300583e25c1ed90.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6243dd554deeb1e4af03b490ee806fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1275f5edaf807edc312c8ab2203aae71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf8823613e6b620b2891a4c06e4b707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74d0aea7b7bcbd8bf1ef02c406f601ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad351773d8117faa128041a877bf2db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b024dcba89b9bc12300583e25c1ed90.png)
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2021-08-27更新
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3卷引用:贵州省六盘水市红桥学校2022届高三上学期适应性月考数学(文)试题
名校
解题方法
10 . 已知数列
满足:
.
(1)求
的通项公式;
(2)令
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07bcdbfde40af763cda0fcc69b9d52b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4187f1602d9879c57b19f85b591e893e.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)
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2021-07-05更新
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5卷引用:贵州省凯里市第一中学2021届高三三模《黄金三卷》数学(文)试题
贵州省凯里市第一中学2021届高三三模《黄金三卷》数学(文)试题(已下线)专题06 数列求和(分组法、倒序相加法)-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)(已下线)专题07 数列-备战2022年高考数学母题题源解密(新高考版)河北省衡水中学2022届高三上学期六调数学试题河北省沧州市沧州部分高中2024届高三上学期期中数学试题