名校
解题方法
1 . 某地为了改善中小型企业经营困难,特推进中小型企业加快产业升级,着力从政府专项基金补贴扶持,产量升级和政府指导价三个方向助力中小型企业.某企业
在产业升级前后的数据如下表:
若该企业在政府指导价下出售产品,能将其生产的产品全部售出.注:收益=销售金额+政府专项补贴-成本.
(1)当该企业没有政府补贴时,收益是多少?
(2)从
企业经营者角度分析,是不是申请的政府补贴越多,收益越大?若是请说明理由,若不是,则该企业向政府申请多少专项基金补贴,所获收益最大.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
若该企业在政府指导价下出售产品,能将其生产的产品全部售出.注:收益=销售金额+政府专项补贴-成本.
![]() | 产量(万件) | 投入成本(万元) | 销售单价(元/件) |
产业升级前 | 2 | 45 | 30 |
完成产业升级后,获补贴![]() ![]() | 产量![]() ![]() | ![]() | ![]() |
(2)从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
2023-02-23更新
|
185次组卷
|
4卷引用:宁夏银川市景博中学2022-2023学年高二下学期期末质量检测数学(文)试题
名校
2 . 传说古希腊毕达哥拉斯学派的数学家用沙粒和小石子来研究数他们根据沙粒或小石子所排列的形状把数分成许多类,下图中第一组的1,3,6,10称为三角形数,第二组的1,5,12,22称为五边形数,则三角形数的第7项为___________ ,五边形数的第n项为___________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/232d818c-663b-421e-b90e-15b50e94d206.png?resizew=440)
您最近一年使用:0次
3 . 已知等差数列
的公差不为0,若
成等比数列,则这个等比数列的公比是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6143ff1743d17cc9c92f44dbcca18359.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2023-02-14更新
|
593次组卷
|
3卷引用:宁夏银川市景博中学2022-2023学年高二下学期期末质量检测数学(文)试题
名校
解题方法
4 . 已知等差数列
和等比数列
满足,
.
(1)求数列
,
通项公式
(2)设数列
中满足
,求和
![](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/48d3570bf2183c095e9111e86602fcae.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330a90b55ebb8314745409bb260e6407.png)
您最近一年使用:0次
2023-02-08更新
|
1023次组卷
|
8卷引用:宁夏银川市景博中学2022-2023学年高二下学期期末质量检测数学(文)试题
名校
解题方法
5 . 已知数列
满足
,
,数列
满足
,若数列
的前
项和为
,则使得
成立的
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73d56c0442eccb800e5b1d7222f150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0946b13cc360976aea85a222f66cc7f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.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/f38b750ba6fef8a8621abbfce759acfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2023-01-18更新
|
151次组卷
|
2卷引用:宁夏中卫市中宁县2022-2023学年高二上学期质量测查(期末)数学(理)试题
解题方法
6 . 若两个正实数
,
满足
,且不等式
有解,则实数
的取值范围( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f396c5ec8013468c9de9b2cd6f2f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7fa964f414fad68d6d1012b3c554e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
7 . 已知
为数列
的前
项和,
,
,则
( )
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a091d040996d5660c31ec026e87eecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4b5a382f920203b9ef307224ae641e.png)
A.1011 | B.2022 | C.3033 | D.4044 |
您最近一年使用:0次
8 . 已知等差数列
的前
项和为
,数列
为正项等比数列,且
,
.
(1)求数列
和
的通项公式;
(2)若
设
的前
项和为
,求
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0729b691ef34c107bc6e317cb35fd9b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7474baf276836e8fcfb8ee9948fed753.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
您最近一年使用:0次
2023-01-10更新
|
965次组卷
|
4卷引用:宁夏青铜峡市宁朔中学2023届高三上学期线上期末考试数学(理)试题
宁夏青铜峡市宁朔中学2023届高三上学期线上期末考试数学(理)试题江苏省扬州市新华中学2022-2023学年高三上学期期末模拟数学试题(已下线)山东省济南市2022届高三二模数学试题变式题17-22(已下线)专题4 数列
9 . 在等比数列
中,公比
是数列
的前
项和,若
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466ea79071a750b4234e038fbf117501.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/202fe13ed24d989245057c631ba05c0d.png)
A.![]() | B.数列![]() |
C.![]() | D.数列![]() |
您最近一年使用:0次
2023-01-10更新
|
399次组卷
|
2卷引用:宁夏青铜峡市宁朔中学2023届高三上学期线上期末考试数学(理)试题
解题方法
10 . 在△ABC中,已知
.
(1)求角C的大小;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8b002408a1c2586018a621deff6880.png)
(1)求角C的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d6201ae8b341fe7c2e578429dddcb.png)
您最近一年使用:0次