名校
1 . “
”是“数列
为等差数列”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca08bf98f69576373557eca8e5bef4dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分又不必要条件 |
您最近一年使用:0次
2023-09-01更新
|
855次组卷
|
4卷引用:云南省昆明市第一中学2024届高三第二次双基检测数学试题
名校
解题方法
2 . 已知
为等差数列
的前
项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07faf3d825a256ad497f5a74ec6745e.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/9f4d50bc5dfb09fcf888e70aa0ecc1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07faf3d825a256ad497f5a74ec6745e.png)
您最近一年使用:0次
名校
解题方法
3 . 数列
满足
,
是常数.
(1)当
时,求
及
的值;
(2)数列
是否可能为等差数列?若可能,求出它的通项公式;若不可能,说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72c1ffacd813446fa9670b78e710680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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4 . 已知首项为1的等比数列
满足
成等差数列,则公比
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf1ae1ee45eb32d0bbbd152bce34899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
A.![]() | B.![]() | C.2 | D.![]() |
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解题方法
5 . 设
是正项等比数列,
为
、
的等差中项.
(1)求
的公比;
(2)若
,求数列
的前
项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7755b0ec8df40da1e10c3567e441be7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e225008eef585b85da5a44eadf509f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
6 . 已知等差数列
的前
项和为
,且
,
,则
( )
![](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/66ac70beab656f0f39d58762bfc8e115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca2cc2768794136c1e4da47d2f0873e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
A.7 | B.5 | C.4 | D.![]() |
您最近一年使用:0次
7 . 《周髀算经》中有这样一个问题:从冬至日起,依次小寒、大寒、立春、雨水、惊蛰、春分、清明、谷雨、立夏、小满、芒种,这十二个节气其日影长依次成等差数列,冬至、立春、春分日影长之和为31.5尺,前九个节气日影长之和为85.5尺,则谷雨日影长为( )
A.3.5尺 | B.4.5尺 | C.5.5尺 | D.6.5尺 |
您最近一年使用:0次
解题方法
8 . 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
9 . 设双曲线
的焦距为
,若
成等差数列,则双曲线的渐近线方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8dcc91c2ffb5571eaf944c34f5e8ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6e7e03305ce819a63b754cab365c6c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-02-22更新
|
926次组卷
|
3卷引用:云南省临沧市民族中学-2022-2023学年高二下学期期中数学试题
名校
解题方法
10 . 已知公差不为0的等差数列
的前
项和为
成等差数列,且
成等比数列.
(1)求
的通项公式;
(2)若
的前
项和为
.证明:
.
![](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/84b6a4eea9a433a20f02bb6e453f4dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e216bf7310c2334ad072ce6b02285223.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4991360dd5394695ae39b85e89122c.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/aa33d6f116c61ab89224c1a9886861cd.png)
您最近一年使用:0次
2023-02-15更新
|
1806次组卷
|
8卷引用:云南师范大学附属中学2023届高三上学期高考适应性月考卷(六)数学试题
云南师范大学附属中学2023届高三上学期高考适应性月考卷(六)数学试题云南师范大学附属中学2022-2023学年高二上学期第二学段模块考试数学试题云南省昆明市第一中学2023届高三下学期数学复习试题广东番禺中学2022-2023学年高二上学期期末数学试题(已下线)仿真演练综合能力测试(二)河南省周口市项城市第一高级中学2022-2023学年高二上学期期末考试数学试题(已下线)重难点专题04 数列求和-2022-2023学年高二数学重难点题型分类必刷题(人教B版2019选择性必修第三册)广东省广州市广东番禺中学2022-2023学年高二上学期期末数学试题