名校
解题方法
1 . 已知正项数列
前n项和为
,满足
,数列
满足
,记数列
的前n项和为
,
(1)求数列
的通项公式;
(2)求满足不等式
的正整数
的最大值.
![](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/73884a7d765a6d27e76661c1792bd946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22f6641a74f0570d8044438f1ff0b3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求满足不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cf6f3f007d63219071bb5228a8efac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2024-01-27更新
|
495次组卷
|
3卷引用:湖南省株洲市第二中学2021-2022学年高二上学期第三次月考数学试卷
湖南省株洲市第二中学2021-2022学年高二上学期第三次月考数学试卷湖南省永州市2023-2024学年高二上学期期末质量监测数学试题(已下线)专题04数列求和的6种常考题型归类【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)
名校
解题方法
2 . 中国政府在第七十五届联合国大会上提出.“中国将努力争取在2060年前实现碳中和.”随后,国务院印发了《关于加快建立健全绿色低碳循环发展经济体系的指导意见》.某企业去年消耗电费50万元,预计今年若不作任何改变,则今年消耗电费与去年相同.为了响应号召,节能减排,该企业决定安装一个可使用20年的太阳能供电设备,并接入本企业的电网.安装这种供电设备的费用(单位:万元)与太阳能电池板的面积(单位:
)成正比,比例系数约为0.6.为了保证正常用电,安装后采用太阳能和电能互补供电的模式.设在此模式下,安装太阳能供电设备后该企业每年消耗的电费
(单位:万元)与安装的这种太阳能电池板的面积
(单位:
)之间的函数关系是
(
,k为常数).记该企业安装这种太阳能供电设备的费用与20年所消耗的电费之和为
(单位:万元).
(1)求常数
,并写出
关于
的函数关系式;
(2)当太阳能电池板的面积为多少平方米时,
取得最小值?最小值是多少万元?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2452c4492dfae1133fa7088a3baa5ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当太阳能电池板的面积为多少平方米时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2024-01-20更新
|
344次组卷
|
3卷引用:湖南省株洲市第一中学2021-2022学年高一上学期期末数学试题
名校
解题方法
3 . 公比为
的等比数列
的前
项和
.
(1)求
与
的值;
(2)若
,记数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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/e6b981758450e9dcee6cfbe6c67c61f8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f5b1a6c081ca11ee5c4723525a43ce.png)
您最近一年使用:0次
2024-01-16更新
|
1310次组卷
|
3卷引用:湖南省株洲市第二中学2022届高三上学期期中数学试题
名校
解题方法
4 . 记
的内角A,B,C的对边分别为a,b,c,分别以a,b,c为边长的正三角形的面积依次为
,
,
,且
.
(1)求角A;
(2)若
,D为线段BC延长线上一点,且
,
,求
的BC边上的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126e6d6c2643cee094d0182179f24c5a.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8653af649d2a1b22f50c8529ef43136d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731ac94d7d7af196a74d9aa5021cbb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a21782163ade7050baa9b96b22c196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-01-10更新
|
806次组卷
|
4卷引用:湖南省长沙市宁乡市第一高级中学2021届高三第三次模拟考试数学试卷
名校
解题方法
5 . 如图,在平面四边形
中,
为钝角三角形,
为
与
的交点,若
,且
.
(1)求
的大小;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f873e0038305a4be8e1009466bbd1567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707586d867490f9764cc5615c9fcccd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3233cfb838759281834ea1e96287d1d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/8ff02d20-5e7a-4a82-b555-c2a0b8fddfe5.png?resizew=168)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
您最近一年使用:0次
2024-01-03更新
|
1351次组卷
|
6卷引用:湖南省株洲市第一中学2022届高三上学期期末数学测试卷
湖南省株洲市第一中学2022届高三上学期期末数学测试卷重庆市南开中学校2024届高三上学期第五次质量检测数学试题重庆市沙坪坝区南开中学校2024届高三上学期第五次质量检测数学试题广东省梅州市梅县东山中学2024届高三上学期期末数学试题(已下线)考点19 解三角形中的几何问题 --2024届高考数学考点总动员【练】(已下线)考点19 解三角形中的几何问题 --2024届高考数学考点总动员【讲】
名校
解题方法
6 . 已知等比数列
的公比
,且
,
,
是公差为
的等差数列
的前3项.
(1)求
的最小值;
(2)在
取最小值的条件下,设
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc17ca3ab612ea9cf6cfa1eea53cb1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450bfba8c76f5957e945026cbd235298.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450bfba8c76f5957e945026cbd235298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f672010fe85e005afba869d1c50e27.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/2e8aef2efae0e76650c8463d80f69a14.png)
您最近一年使用:0次
2024-01-13更新
|
310次组卷
|
2卷引用:湖南省长沙市宁乡市第一高级中学2021届高三第三次模拟考试数学试卷
名校
解题方法
7 . 已知
的内角
的对边分别为
,
为锐角,
的面积为
,
.
(1)判断
的形状,并说明理由;
(2)如图,若
,
,
为
内一点,且
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e2557d6c0eeb8e56c84db1c4931c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a20335e6e069d4e336be684c418358.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/9494dd0f-34bd-4ced-9fd5-1c53ec8a4aa1.png?resizew=190)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c4b6a72d43121cb2c49f81cacbeef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c78f77e5b86ccd537e5f027de9ffe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1553b3dc17566ea973bb62b9daeb6dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
您最近一年使用:0次
2023-12-29更新
|
892次组卷
|
3卷引用:湖南省株洲市第一中学2022届高三上学期期中数学试题
名校
解题方法
8 . 记
的内角
的对边分别为
,
,
,
为
边的中点,已知
.
(1)求
;
(2)当
时,求
的最大值.
![](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/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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2212e2b2cccab3bec4502f2aa6a38c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2023-12-02更新
|
565次组卷
|
2卷引用:湖南省长沙市宁乡市第一高级中学2021届高三下学期第一次模拟考试数学试卷
名校
解题方法
9 . (1)已知
,求
的最小值;
(2)已知
,
,且
,若
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d0a1d5208a4c67c43cf7614804cf39.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04645353d91a5beb6d02c06bb62683a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf0760b8fbbeb6f2a90607348fd78a2.png)
您最近一年使用:0次
2023-11-21更新
|
361次组卷
|
3卷引用:湖南省株洲市第一中学2021-2022学年高一上学期期中数学试题
湖南省株洲市第一中学2021-2022学年高一上学期期中数学试题湖南省常德市第一中学2023-2024学年高一上学期期中考试数学试题(已下线)高一上学期期末数学考试模拟卷-【题型分类归纳】(人教A版2019必修第一册)
名校
解题方法
10 . 已知
的内角
的对边分别是
,满足
.
(1)求
;
(2)若
是
的中点,且
,求
的面积.
![](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/7d8a00e9eb1795de01f19e9341bbd7e9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4584ad441c4c7451cf0c39d9de178912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b9cb7a15e94716284f2ccc603da046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-11-16更新
|
249次组卷
|
2卷引用:湖南省株洲市第二中学2021-2022学年高二上学期期中测试数学试卷