2019·陕西·高考模拟
1 . 公比为
的等比数列{an}的各项都是正数,且a2a12=16,则
=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e05161e0934e5c7b9544f69139a63b.png)
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2 . 已知正项等比数列
的前
项和为
,若
,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315a628edc31983a7223ff093cbefbca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
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2020-04-23更新
|
332次组卷
|
4卷引用:陕西省西安市2024届高三下学期三模数学(理)试卷
陕西省西安市2024届高三下学期三模数学(理)试卷四川省成都市金堂县淮口中学校2024届高三下学高考仿真冲刺卷(一)文科数学试题福建省广东省2019-2020学年高三4月联考数学(理科)试题(已下线)专题03 等比数列及前n项和(专题测试)-2020-2021学年高二数学重难点手册(数列篇,人教A版2019选择性必修第二册)
3 . 已知数列
满足
,当
时,
,且点
是直线
上的点,则数列
的通项公式为_________ ;令
,则当k在区间
内时,使y的值为正整数的所有k值之和为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047c5159dca60e0fb2e98558e6d02592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb33cf1e88b486571012d18ca99a34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25afe415c6baad8a3d38cba3dac24553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afade50377757c0664b549623415c59a.png)
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解题方法
4 . 设
为数列
的前
项和,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
______ .
![](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/acb8569a8c125c9678a3e75c4f1131a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92906e39027c5f92890082114b1b5648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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2020-05-05更新
|
263次组卷
|
4卷引用:陕西省安康市2019届高三下学期第三次教学质量联考文科数学试题
名校
5 . 已知正项等比数列
的前
项和为
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.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/7110f600351b404b84e6d252d36b4ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa45ba57a920ce722a0e17307601b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
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2019-12-21更新
|
365次组卷
|
2卷引用:2020届陕西省渭南市白水中学高三第三次模拟考试文科数学试题
名校
6 . 已知数列
为等比数列,且
,则
的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6962964a070e0aa4a356690c4d7d318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909def7de46ff742022078c8db26a4e.png)
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2019-10-15更新
|
321次组卷
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5卷引用:【全国市级联考】陕西省咸阳市2018届高三模拟考试(三模)数学文试题
【全国市级联考】陕西省咸阳市2018届高三模拟考试(三模)数学文试题2020届陕西省渭南市临渭区高三模拟考试数学(文)试题【全国百强校】北京师范大学附属实验中学2019届高三3月高考模拟试卷(一)数学(理科)试题【全国百强校】江苏省海安高级中学2018-2019学年高一下学期期中考试数学试题1(已下线)专题6.7 第六章 数列(单元测试)(测)-浙江版 《2020年高考一轮复习讲练测》
7 . 设
为等比数列
的前
项和,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2e958b28688aa6250cd3b83cb55902.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e26ce191b1793ab61430757b48226e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2e958b28688aa6250cd3b83cb55902.png)
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2019-05-22更新
|
781次组卷
|
2卷引用:陕西省2019届高三第三次教学质量检测理科数学试题
名校
8 . 已知等比数列
中,
,数列
是等差数列,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7865569170f568a4f832dc6cddaec3.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308446a48f8be34cb7a8795df57269bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813212c49ff1aa099db88c562b46eca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7865569170f568a4f832dc6cddaec3.png)
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2019-05-17更新
|
1634次组卷
|
6卷引用:陕西省西安中学2022届高三下学期第一次仿真考试理科数学试题
9 . 记
为数列
的前项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
_______ .
![](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/5b8e34cdd334b668fe8ca80e133833b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
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2019-04-29更新
|
1595次组卷
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7卷引用:【校级联考】陕西省西安地区陕师大附中、西安高级中学等八校2019届高三4月联考数学(理)试题
10 . 已知
是数列
的前
项和,数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44b46753fd7c166ecaeef23b8335342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
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