名校
解题方法
1 . 各项均为正数的数列
的前
项和为
,且
,
,若对任意的
,
恒成立,则实数
的取值范围是( )
![](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/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0385716a46aaf2cea5ec74ce940a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7ec904dab10a7199f5da702ab59150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-03-06更新
|
373次组卷
|
2卷引用:江西省抚州市临川一中2018-2019学年高一下学期第一次月考数学试题
名校
解题方法
2 . 在
中,
,
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d6113e2fa9b7b0cb6a1c9243d6f8f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-02-18更新
|
740次组卷
|
4卷引用:辽宁省锦州市黑山县黑山中学2019-2020学年高一6月质量检测数学试题
辽宁省锦州市黑山县黑山中学2019-2020学年高一6月质量检测数学试题新疆乌鲁木齐市第一中学2018-2019学年高一下学期期中数学试题安徽省合肥市肥东县第二中学2019-2020学年高一(共建班)下学期期中数学试题(已下线)1.1.1+正弦定理(1)(基础练)-2020-2021学年高二数学十分钟同步课堂专练(人教A版必修5)
3 . 在
中,内角
,
,
所对的边分别为
,
,
,已知
,
,若
的面积为
,则
( )
![](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/7d8abff30fc308565d3a23dd2739e5c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20324f981e88dcc23b8131084d133aba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-01-01更新
|
874次组卷
|
3卷引用:辽宁省锦州市黑山县黑山中学2019-2020学年高一6月质量检测数学试题
名校
4 . 设集合
,集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db399d2e88b64b01e785b27e3332e026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d5c90949490d87efb7b0335ecc938e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336d38741aab2255a35c26612bbd7cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-12-28更新
|
433次组卷
|
3卷引用:2020届辽宁省锦州市渤大附中、育明高中高三下学期开学摸底考试数学(理)试题
2020届辽宁省锦州市渤大附中、育明高中高三下学期开学摸底考试数学(理)试题福建省泉州市南安第一中学2019-2020学年高三上学期第二次月考数学(文)试题(已下线)第01讲 集合-2021年新高考数学一轮专题复习(新高考专版)
名校
5 . 已知
,
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8832d490c60e45352719ba0fec4035d3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-12-01更新
|
380次组卷
|
3卷引用:河南省开封市五县联考2019-2020学年高二上学期期中数学(理)试题
6 . 在
中,
,
,
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724bcf18ef47c962a297640bf7afd5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47e66258d3c21dd9bf44dab2c960afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() | C.![]() | D.2 |
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2019-11-01更新
|
601次组卷
|
5卷引用:辽宁省锦州市凌海市第三高级中学2019-2020学年高一6月月考数学试题
辽宁省锦州市凌海市第三高级中学2019-2020学年高一6月月考数学试题甘肃省武威市第十八中学2019-2020学年高二上学期10月月考数学试题(已下线)2020届高三12月第01期(考点04)(理科)-《新题速递·数学》(已下线)2020届高三12月第01期(考点04)(文科)-《新题速递·数学》山西省忻州市岢岚县中学2020-2021学年高一下学期4月月考数学试题
名校
解题方法
7 . 在
中,内角
所对的边分别为
.若
,则角
的值为
![](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/f52153cd247c62030aaa74f3e0872162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-09-19更新
|
730次组卷
|
8卷引用:辽宁省锦州市2018-2019学年高一下学期期末数学试题
8 . 等差数列
的首项为
.公差不为
,若
成等比数列,则数列
的前
项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e018deab6a5ae6fb4d47b8e197df4df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-09-19更新
|
284次组卷
|
2卷引用:辽宁省锦州市2018-2019学年高一下学期期末数学试题
9 . 已知等差数列
的前
项和为
.且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa8a9cce029931fa51feb49e722879e.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/bbabb0b0634ca0608b9fb9b3bf8f48b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa8a9cce029931fa51feb49e722879e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 等差数列
的前
项和为
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7020cf98fa9b1c2458105199fb22197c.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/e980df7a6b22f5883847e2472afaeb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7020cf98fa9b1c2458105199fb22197c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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