名校
解题方法
1 . 某皮鞋厂有一号、二号、三号三个车间进行生产,在今年
月份共生产了
双皮靴,在出厂前要检查这批产品的质量,决定采用分层抽样的方法进行抽取,若从一、二、三号三个车间抽取的产品数分别为
、
、
,且
、
、
构成等差数列.
(1)求第二车间生产的产品数;
(2)已知一号厂生产了
双,若总共抽查了
双皮鞋,从中再抽取两双,求这两双没有在同一个车间的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ad7d2f051aaf9811a26294197f8d1.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)
(1)求第二车间生产的产品数;
(2)已知一号厂生产了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f0e3992efedab109b99e6e172e6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
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13-14高三·湖北黄冈·期末
2 . 等比数列
的前n项和
,已知
,且
,
,
成等差数列.
(1)求数列
的公比q和通项
;
(2)若
是递增数列,令
,求
.
![](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/4ccdc17b603871d20843ffccca2df0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7131900393b9906bd6dcfe26ade2059f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911278aa8595846abac1972e1de59995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0462c9dc4a0bd08a0ec1cc07f1d2f3e6.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da88afe0e3c504680430deeaf1c6da1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7082743fb8fc456042c9e7b817b5d087.png)
您最近一年使用:0次
2016-12-02更新
|
676次组卷
|
4卷引用:2016-2017学年福建南安侨光中学高二理上第一次阶段考试数学试卷
2016-2017学年福建南安侨光中学高二理上第一次阶段考试数学试卷(已下线)2014届湖北黄冈市高三年级秋季期末考试理科数学试卷2014-2015学年安徽省皖中“四校联盟”高一下学期联考理科数学试卷2014-2015学年安徽省皖中“四校联盟”高一下学期联考文科数学试卷
2011·浙江宁波·一模
解题方法
3 . 在
中,角
所对的边分别为
,且
成等差数列.
(1)求角
的大小;
(2)若
,求
边上中线长的最小值.
![](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/713fbbd9cda10d832b8ef5cdb033a427.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be4380bdcef1c542604a6ad61642c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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11-12高二上·福建福州·期中
4 . 已知
成等差数列.又数列
中
.此数列的前
项的和
(
)对所有大于1的正整数
都有
.
(1)求数列
的第
项;
(2)若
是
的等比中项,且
为
的前
项和,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6faca16ed941f4a4b28b0662aba14ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c78886c192480eb5dec0ee3c61b23f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.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/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9517cd7186eac28accc8f3742b3c3502.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc799cb64e5c0592e4da58de51ccf243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368daafa90cb0f6ce8f2bb37558cf84d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
5 . 在
中,角
所对的边分别为
,已知
.
(1)求证:
成等差数列;
(2)若
,
的面积为
,求
.
![](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/6698853480ab7fed92d252f5b88ee1af.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4a8c2c7845cfb1b094d13e66e0ed87.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0334bc85843337c4dfcfdc5c638f9f62.png)
![](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/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
6 . 已知
的一个内角为
,并且三边长构成公差为4的等差数列,则
的面积( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 设
:
成等比数列;
:
成等差数列,则条件
是条件
成立的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9def7c418e18985b64f4ebf22a9a206a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf4a1eb92a771deabbd7d6555e224c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25889dca46b87b009fa27b1cbda0ba0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6cdb511db29d3268f489fc40650899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9def7c418e18985b64f4ebf22a9a206a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25889dca46b87b009fa27b1cbda0ba0d.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
12-13高二上·山东聊城·期中
解题方法
8 . 在
中,A、B、C分别为a、b、c所对的角,若a、b、c成等差数列,则B的范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 有四个正数,前三个数成等差数列,其和为48,后三个数成等比数列,其最后一个数为函数
的最大值,求这四个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6386edac00e0cceda1ebbd57ae36b9d.png)
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