名校
1 . 已知等比数列
的公比为q,则“
是“
,
,
成等差数列”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d9b6c86435e0ceff94d8ad1cd03737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a37f1b45e929b42044626edb63681fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b2667a6c91b720ca9b42d092c776cf.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2023-07-28更新
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722次组卷
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4卷引用:湖北省武汉第六中学2024届高三上学期第一次月考数学试题
2 . 若实数
、
、
成等差数列,则直线
必经过一个定点,则该定点坐标为______ .
![](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/50f6e1f67dc15c3cf135a78af95c70fe.png)
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2023-06-20更新
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455次组卷
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4卷引用:第01讲 直线的方程(九大题型)(讲义)-2
(已下线)第01讲 直线的方程(九大题型)(讲义)-2上海师范大学附属中学2022-2023学年高二下学期3月第二次月考数学试题上海市宝山区2022-2023学年高二下学期期末数学试题上海市上海大学附属中学2023-2024学年高二下学期3月月考数学试卷
名校
解题方法
3 .
中,角
所对应的边分别为
,且
.
(1)求角
的大小;
(2)若
的面积为
,边
是
的等差中项,求
的周长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157904a631cff4e8edc86bd7e83c13c1.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-06-13更新
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370次组卷
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2卷引用:江西省南昌市第二中学2024届高三上学期开学考试数学试题
4 . 设随机变量
的可能取值分别为
,0,1,相应的概率值分别为
,又
成等差数列,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d419c30ff40e9b368a3f151f639dac8f.png)
_________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c0f363e40a7bcb1a705f74bf08e871.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9bf0198e73b44944ce7a45411899f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9bf0198e73b44944ce7a45411899f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f0d6605000c462981aae73a4be677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d419c30ff40e9b368a3f151f639dac8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c0f363e40a7bcb1a705f74bf08e871.png)
您最近一年使用:0次
名校
5 . 已知等比数列
的公比为2,前
项和为
,且6,
,
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/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
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2023-06-02更新
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648次组卷
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5卷引用:陕西省西北工业大学附属中学2023届高三下学期第十三次适应性训练文科数学试题
名校
6 . 在等差数列
中,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e13b5d643e6f2e035ef9388961b8997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5d97312b0c5392caf086deab599042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e13b5d643e6f2e035ef9388961b8997.png)
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2023-05-26更新
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1538次组卷
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5卷引用:广西南宁市第二中学2023届高三高考考前模拟大演练数学(文)试题
广西南宁市第二中学2023届高三高考考前模拟大演练数学(文)试题广西南宁市第二中学2023届高三高考考前模拟大演练数学(理)试题(已下线)专题4 等差数列的性质 微点1 等差数列项的性质陕西省西安市铁一中学2024届高三上学期期末数学(理)试题(已下线)题型15 等差数列、等比数列的性质及其前n项和解题技巧
名校
7 . 已知
是公比为
)的等比数列,且
成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c22c96b4d06bc3172cbeb08f4e8c4d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7fee1de02d5646760c035154e26927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
您最近一年使用:0次
2023-05-26更新
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8卷引用:北京市人大附中2023届高三三模数学试题
北京市人大附中2023届高三三模数学试题(已下线)专题08 数列江苏省部分四星级高中2023-2024学年高三上学期期初调研数学试题(已下线)江苏省南通市如皋市2023-2024学年高三上学期期初调研数学试题四川省成都市田家炳中学2024届高三第一次月考文科数学试题江苏省南京外国语学校2023-2024学年高三上学期期中模拟数学试题(已下线)黄金卷06(已下线)黄金卷05
8 . 已知
是等差数列,
是等比数列,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/445bb7497238eeb8c8b55f314f375558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aedc16dd3b7d0ab0ee68bde2337a9ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2bc833b58d9e6b851266809bb4f7d3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
22-23高二下·全国·课后作业
解题方法
9 . 已知数列
满足
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c0886362228655cb93f421d6abf4cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f058265d2335368907242d3d5ac4134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
您最近一年使用:0次
名校
解题方法
10 . 用
表示等差数列
的前n项和,若
,
,则m的值为______ .
![](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/9fd0bb7c3f12490565f451f5e27756bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9130bf13b87401f4a55e1783da8965a1.png)
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2023-05-21更新
|
1177次组卷
|
4卷引用:四川省成都市第七中学2023届高考模拟文科数学试题