名校
解题方法
1 . 设
是数列
的前
项和,若
,
,则数列
的前99项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c56f4e813ae93b11c10fadb8dbda3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fc12ac1d37daa895e43d88e4eda9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599dd4a7c85c84a27a6ea228e6d360ef.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-03-20更新
|
1892次组卷
|
8卷引用:【市级联考】湖北省十堰市2019届高三年级元月调研考试文科数学试题
2 . 观察下列各式
,
,
,
,
,…,则
的十位数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fd5f93a7cf310a25ef90a50e9a379d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e926a06f88026f88c35e8d61a676e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47ae0cf46424053864124614a76f132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3407de29518658aecbb04de7ffb40246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6ac491ab5f8918d7832f4cc546f02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf2adb6a9fe7bfa7ba3f993a6717152.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-09-24更新
|
268次组卷
|
3卷引用:湖北省十堰市2018-2019学年高二下学期期末考试数学(理)试题
名校
3 . 已知等差数列
的公差为-2,前
项和为
,若
,
,
为某三角形的三边长,且该三角形有一个内角为
,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.5 | B.11 | C.20 | D.25 |
您最近一年使用:0次
2019-01-23更新
|
761次组卷
|
5卷引用:【市级联考】湖北省十堰市2019届高三元月调研考试理科数学试题
【市级联考】湖北省十堰市2019届高三元月调研考试理科数学试题2019届四川省仁寿第一中学校南校区高三下学期第三次模拟数学(理)试题(已下线)冲刺卷03-决战2020年高考数学冲刺卷(山东专版)河北省石家庄市藁城区第一中学2020届高三下学期月考二数学(文)试题(已下线)第七章 数列专练18—数列与三角函数的综合-2022届高三数学一轮复习
4 . 已知
,
满足约束条件
则
的取值范围是
![](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/7f01fd49da17598efd055fd820d893e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250bc5fe6f09fb9112c289a2d3ea80ec.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
5 . 在
中,
,
,
所对的边分别为
,
,
,已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a5254b237e709589d3aa990b9ef83d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/3ae7888d643678ea18f83f3237732052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d09196d6643e64ab5b9b5df02d98a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a5254b237e709589d3aa990b9ef83d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-01-23更新
|
1929次组卷
|
5卷引用:【市级联考】湖北省十堰市2019届高三元月调研考试理科数学试题
名校
6 . 在等差数列
中,若
,
是方程
的两个根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e7b23fd74e3cf89ac541cb7a5d88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9259a1c2f3e2171834f8e0e403da88b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-01-09更新
|
668次组卷
|
6卷引用:【市级联考】湖北省十堰市2019届高三年级元月调研考试文科数学试题