解题方法
1 . 已知数列
满足
,其前n项和为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b93bb2c66e49ac3efaf0686d4f3815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b75ec86aa0e1fe86f6fdeee4ab26ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.![]() | B.0 | C.2 | D.4 |
您最近一年使用:0次
2023-03-30更新
|
1351次组卷
|
4卷引用:河南省名校青桐鸣2023届高三3月联考理科数学试题
2 . 设
为数列
的前
项和,
,对任意的自然数
,恒有
.
(1)求数列
的通项公式;
(2)若集合
,
,
,
,将集合
中的所有元素按从小到大的顺序排列构成数列
,计数列
的前
项和为
.求
的值.
![](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/b5f21c9c920ec8bc13650e9b2f455290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189f79c3ac334905aed6f30cdb7cc4a5.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508c388d94fedc031fc0cdfb65c3c257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aeed01128afa5f0bd007ca754dad92d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572660ba18ec5e5ec25d312bd9585b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aeed01128afa5f0bd007ca754dad92d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f69c41b2368b2d878256d6aab735e886.png)
您最近一年使用:0次
2023-03-26更新
|
1210次组卷
|
2卷引用:江苏省南京中华中学、南京师范大学附属中学江宁分校两校2022-2023学年高三下学期3月联考数学试题
名校
3 . 在等差数列
中,已知
,那么
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd50a615f51e3a73e2fddf58125915f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-24更新
|
710次组卷
|
2卷引用:河南省商丘市等2地临颍县第一高级中学等2校2022-2023学年高三下学期3月月考理科数学试题
名校
4 . 已知数列
和
均为等差数列,且
为定值,若
,则
( )
![](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/659dbe6ae4b4ef812aa0294026fc5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9140f0a21bab8a35fe41485dde1e2086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f37c41b3d37ebff1242f840b5fe0c0.png)
A.56 | B.72 | C.88 | D.104 |
您最近一年使用:0次
解题方法
5 . 已知数列
各项均为正数,
且
,数列
满足
,若
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce18518a5a78ea30254638e8d603ee38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca5e1c7f05561a5f27199a99f12ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928e02b97849ca27689cf3ba8706928e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7d132982ea9592f4fc83060de2c362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166a40365a42b31a364defa68c4597b1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
6 . 已知等比数列
满足
,且
,
为数列
的前
项和.
(1)求
的通项公式;
(2)
(
)能否构成等差数列,若能,则求
的值;若不能,则说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9954d6701d2b7d8302684bb896a1afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4787b11b456ed3075d53fd6c05099c.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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c2ea72de471c76180aeb6dddc6ab8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cd89a09ed5e6e2950ed665a2965186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1620d091f50ea9ad7666e1c3cfaaa4f.png)
您最近一年使用:0次
名校
7 . 非零实数
满足
成等差数列,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3764eec0b5e3e1415bb225c12d2663c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcba524ea58286f8bbea28ae85c66c5.png)
A.![]() | B.![]() | C.3 | D.![]() |
您最近一年使用:0次
2023-03-16更新
|
720次组卷
|
2卷引用:浙江省宁波市十校2023届高三下学期3月联考数学试题
名校
8 . 已知
,
,若
,
,
成等差数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af88a7628c71d642d3a6df067c15f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0212ab68627919b1d22ac348a3e849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87879773a7ebf675a232100dceaf9a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6fce004c47849c29ebd8d5d7c16e98.png)
A.0或1 | B.1或![]() | C.1或![]() | D.0或![]() |
您最近一年使用:0次
9 . 在
中,角
,
,
所对的边分别为
,
,
,若
,
,
成等差数列,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9c678a23c9966125ee32f3f92e31ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b9afe6e2307c6a8b0097a6c45b227c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-09更新
|
1018次组卷
|
4卷引用:江西省赣州市2023届高三下学期3月摸底理科数学试题
江西省赣州市2023届高三下学期3月摸底理科数学试题江西省赣州市2023届高三摸底考试数学(理)试题(已下线)专题06三角函数与解三角形(选择填空题)(已下线)专题3.3 解三角形(分层练)(四大题型+7道精选真题)
10 . 已知各项为正数的等差数列
的前n项和为
,首项
,且数列
也是等差数列.
(1)求数列
的通项公式;
(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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f43c333f115b615ddd6f70f3ac43280e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cbe66fe4e84b4022721122baab4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次