1 . 数列
的通项公式是
,若前
项和为20,则项数
为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5034a6a8063b7547521fec1cabeda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2017-11-26更新
|
476次组卷
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2卷引用:福建省莆田第九中学2017-2018学年高二上学期期中考试数学(文)试题
2 . 已知
(
为自然对数的底数).
(1)讨论函数
的单调性;
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54783b74e1cf364571bf6cbfc266a4ae.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5973923fc8df4e31607135a58f488ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f00a44f6944109fa88b51ce360e6156.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54783b74e1cf364571bf6cbfc266a4ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d02d2e36f43b73d93397c12c30c1ab.png)
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2017-11-24更新
|
454次组卷
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2卷引用:福建省福清市校际联盟2018届高三上学期期中考试数学(文)试题
名校
3 . 已知在公差不为零的等差数列
中,
成等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a32a6cbeaee7b3653524e07291dee6.png)
(I)求数列的通项公式
;
(II)若数列满足
,
,求
.
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2017-11-09更新
|
1192次组卷
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4卷引用:2019年福建省两校联考高三上学期第一次月考数学(文)试题 (永安市第一中学、漳平市第一中学)
4 .
,写出n=1,2,3,4的值,归纳并猜想出结果,你能证明你的结论吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baddc02fe93b8d32e5caf6b81b326219.png)
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名校
5 . 已知等差数列
中,
是数列
的前
项和,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d754571e10656bf448ca56599ffd94.png)
(Ⅰ)求数列
的通项公式;
(Ⅱ)设数列
的前
项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5b95d2bc97a4c65a25e908bf97a34a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f18f2c2ec67b5e59e4b3d28795d125.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/49d754571e10656bf448ca56599ffd94.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5b95d2bc97a4c65a25e908bf97a34a.png)
(Ⅱ)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30574e84ce6a72b411c71a27b2ee8a68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5056d12487759b2fe1944612639d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2017-10-19更新
|
1069次组卷
|
4卷引用:福建省德化一中、永安一中、漳平一中2018届高三上学期三校联考数学(文)试题1
6 . 已知数列
的各项均为正数,
,且
.
(1)设
,求证:数列
是等差数列;
(2)设
,求数列
的前
项和
.
![](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/e89bddd9c021a9caccc72cd0189e1ceb.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5fc0b571e6545e133d36af338733b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f873ccb064468a69720f95a78e04dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
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解题方法
7 . 已知公差不为0的等差数列
的前三项和为6,且
成等比数列.
(1)求数列
的通项公式;
(2)设
,数列
的前
项和为
,求使
的
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b1b845916a4b6a18cdfbcd308d09c4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a63a976c0e00ddd960f9c7afbfc7be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2017-10-17更新
|
1159次组卷
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5卷引用:【全国市级联考】福建省福州市八县(市)协作校2017-2018学年高二上学期期末联考数学(理)试题
名校
解题方法
8 . 已知函数
的图象恒过定点
,且点
又在函数
的图象上.
(1)求实数
的值;
(2)当方程
有两个不等实根时,求
的取值范围;
(3)设
,
,
,求证:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb97c0d7ccdc0e5e40863b982f08244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8067da87f8f35ecc1d36bdb176ff0077.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c2c78a98f99f01edf69377316edca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b121323023d09d1b263ca41cf4421e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27a9a7f2de9da7195c17645befd842d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d3cf6c6d56b6faa6d9f036f119a97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d5fa85887816de29bcff4f143e3f0c.png)
您最近一年使用:0次
2017-10-04更新
|
1035次组卷
|
2卷引用:福建省泉州市培元中学2024届高三上学期12月月考数学试题
9 . 已知等差数列{an}中公差d≠0,有a1+a4=14,且a1,a2,a7成等比数列.
(Ⅰ)求{an}的通项公式an与前n项和公式Sn;
(Ⅱ)令bn=
(k<0),若{bn}是等差数列,求数列{
}的前n项和Tn.
(Ⅰ)求{an}的通项公式an与前n项和公式Sn;
(Ⅱ)令bn=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df1a077a352c66208e47f4518c3b80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b8aeb9c72a1c1ce0e8ce2962f33386.png)
您最近一年使用:0次
2017-09-10更新
|
741次组卷
|
2卷引用:福建省福州八中2016—2017学年高一下学期期末考试数学试题
名校
10 . 已知数列
满足
,
,若
,
则数列
的前40项的和为
![](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/b996d8eae31a660afcb0469c7003c103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7721c5dc04229f38e13058c38c56f0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49a0e5849705d4908db497f5c975cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a4ed37854c67cdffedc93ce3ecd20e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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