解题方法
1 . 已知公比为2的等比数列
的前
项和为
,且
,
,
成等差数列,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
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名校
解题方法
2 . 设
是数列
的前
项和,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ ;若不等式
对任意
恒成立,则
的最小值为______ .
![](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/0ae9f834d8d546e7e5f9407724f56cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515f1c1e7d53ea98217031df2f460ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481db59092a2453cabe1a5dbf40e9b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2022-11-27更新
|
460次组卷
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4卷引用:辽宁省葫芦岛市协作校2022-2023学年高三上学期第二次考试数学试题
名校
解题方法
3 . 等差数列
前
项和为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6d0982cd9f6eb101fb8f3acd73dad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.png)
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2021-04-27更新
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2185次组卷
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6卷引用:东北师范大学附属中学2021届高三第五次模拟考试文科数学试题
4 . 记
为正项等差数列
的前
项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9b925637ee5c22b42b33764f9007ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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2020-06-29更新
|
725次组卷
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4卷引用:辽宁省葫芦岛市2020届高三5月联合考试数学理科试题
5 . 函数
,对任意实数
,
均满足
,且
,数列
,
满足
,
,则下列说法正确的有_____
①数列
为等比数列;
②数列
为等差数列;
③若
为数列
的前n项和,则
;
④若
为数列{
}的前
项和,则
;
⑤若
为数列{
}的前
项和,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.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/db13144a4b27bc76c6ca989423fe95e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e7e2521bc77d291d6bcbd1195c865c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779c6ce92f25daabbaee424431183f84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03a6f72177172b3676df72898e624b3.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479fc89aea626a25bb624fc35b2de3.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72055969af49f3ea0e16beb0a2f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15526f7c892333030073b85fc3baee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da7ce05575fb2282261ad5a85efaa22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8dbc664a16c8590b0665214e1bc189.png)
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6 . 已知数列
满足
,设数列
的前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
______ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ee0b971a07357810a414af3714cf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79768a4e3970a18741cee3fbd8bcbdad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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2019-12-22更新
|
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2卷引用:辽宁省葫芦岛协作校2019-2020学年高三上学期第二次考试 数学(文) 试题
7 . 若lg 2,lg(2x-1),lg(2x+3)成等差数列,则x的值是________ .
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2018-11-14更新
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3卷引用:2016届辽宁省葫芦岛市一中高三上学期期中理科数学试卷
2016届辽宁省葫芦岛市一中高三上学期期中理科数学试卷(已下线)活页作业3 等差数列-2018年数学同步优化指导(北师大版必修5)上海市复兴高级中学2021-2022学年高一下学期期末线上自测数学试题
8 . 已知数列
的各项均为整数,
,前12项依次成等差数列,从第11项起依次成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9625169eb5cc428a2d47a823780647.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418211967cfd60a02fe2bcfe7f2b03be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9625169eb5cc428a2d47a823780647.png)
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5卷引用:【全国市级联考】辽宁省葫芦岛市2018届高三第二次模拟考试数学(文)试题
【全国市级联考】辽宁省葫芦岛市2018届高三第二次模拟考试数学(文)试题(已下线)2018年高考数学母题题源系列【浙江专版】专题十 等差数列、等比数列及数列的求和(已下线)2018年10月1日 《每日一题》一轮复习【文】-等差数列与等比数列的综合应用(2)(已下线)2019年9月30日《每日一题》2020年高考文科一轮复习—— 等差数列与等比数列的综合应用(2)(已下线)狂刷26 数列的综合应用-学易试题君之小题狂刷2020年高考数学(理)
9 . 设
为正项数列
的前
项和,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11e2bf8d65c24fc845446a32d881bd4.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/bc651bc67c58419bb3fe8b256890e7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11e2bf8d65c24fc845446a32d881bd4.png)
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10 . 已知等差数列
的前
项和为
,若
,则数列
的公差为__________ .
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53518e37e5c3f96303febc06388b684a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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5卷引用:辽宁省葫芦岛协作体2017届高三下学期模拟考试(6月)数学(文)试题
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