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1 . 在锐角三角形
中,角
、
、
的对边分别为
、
、
,若
,则
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/4f071bb360d3449234aa61fd8e571b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8385b075c002cc408de9ca4b75607c0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2020-02-09更新
|
910次组卷
|
4卷引用:安徽省阜阳市界首市2019-2020学年高二上学期期末数学(理)试题
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2 . 已知等比数列
各项均为正数,
是数列
的前n项和,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6b79f7a98ef7d02d163dd8b3766d8c.png)
.
(1)求数列
的通项公式;
(2)设
,求数列
的前n项和
.
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6b79f7a98ef7d02d163dd8b3766d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c31d10e1c2a0c1b9ba734087eb28db1.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644a4e7cd7460a0d96ccae5b192e684a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2020-01-29更新
|
1067次组卷
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7卷引用:2020届安徽省池州市高三上学期期末考试数学(理)试题
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3 . 已知实数x,y满足不等式
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebeb22507dda81762fcb156b2c1c1b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8527bc708e15e8a5265017b0155450cf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-01-29更新
|
2020次组卷
|
14卷引用:2020届安徽省池州市高三上学期期末考试数学(理)试题
2020届安徽省池州市高三上学期期末考试数学(理)试题安徽省安庆一中2019-2020学年高三下学期阶段性检测理科数学试题安徽省滁州市定远县育才学校2020届高三下学期6月模拟数学(理)试题2020届高三2月第01期(考点10)(理科)-《新题速递·数学》2020届湖南省湘潭市高三下学期第三次模拟考试理科数学试题河北省石家庄市2019-2020学年高三下学期5月阶段性训练数学(文)试题河北省石家庄市2019-2020学年高三下学期5月阶段性训练数学(理)试题2020届石家庄市高三年级阶段性训练(文)试题2020届石家庄市高三年级阶段性训练(理)试题2020届河北省石家庄市高考模拟数学(文)试题浙江省丽水市高中发展共同体2020-2021学年高二下学期2月第一次联合测试数学试题江西省南昌县2021届高三上学期期末数学(理)试题新疆师范大学附属中学2019-2020学年高一下学期期末考试数学试题四川省成都名校2023届高三高考考前冲刺模拟(一)理科数学试题
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4 . 若等比数列
的前
项和为
,已知
,
,则
( )
![](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/01d8fd5891c242326417692a1721101c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e55994b1d410426927eaf815fa130a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5178b0c8383f16fd0e50975a21948285.png)
A.9 | B.6 | C.7 | D.4 |
您最近一年使用:0次
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5 . 已知数列
和
满足:
,
,
,数列
的前
项和为
,点
在直线
上.
(Ⅰ)求数列
和
的通项公式;
(Ⅱ)设
,求数列
的前
项和
.
![](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/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b50b3927041221a53f19b6a0549d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452941d3a518602178a0959b2f3e68d0.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6862a28b379360589fe7060d38dfe4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.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)
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2020-01-20更新
|
315次组卷
|
2卷引用:安徽省淮北一中、合肥六中、阜阳一中、滁州中学2018-2019学年高二上学期期末考试数学(文)试题
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6 . 设
,
满足约束条件
,则
的最大值是_____ .
![](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/9da85caf279bb0683836db772cbe1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a125cb40ab3d54de9f3a444032af5e4.png)
您最近一年使用:0次
2020高三上·全国·专题练习
7 . 记
为数列
的前
项和.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
______ .
![](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/4f1cb377a0373cda2a27d324c2e273b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c2b1c2dc2584feb58fcae37b96e2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
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2020-01-17更新
|
806次组卷
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5卷引用:安徽省六安中学2019-2020学年高一下学期期末数学(理)试题
安徽省六安中学2019-2020学年高一下学期期末数学(理)试题(已下线)2020届高三1月(考点06)(理科)-《新题速递·数学》2020届福建省泉州市高三上学期单科质量检查数学(理)试题2020届福建省泉州市普通高中毕业班单科质量检查理科数学试题(已下线)强化卷10(3月)-冲刺2020高考数学之少丢分题目强化卷(山东专版)
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8 . 已知等比数列{an}的公比q>1,且a3+a4+a5=28,a4+2是a3,a5的等差中项
(1)求数列{an}通项公式;
(2)求数列{
}的前n项和Tn.
(1)求数列{an}通项公式;
(2)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005ceae9315ae97b6f613d7161252377.png)
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2020-01-14更新
|
1275次组卷
|
3卷引用:安徽省合肥市庐阳区合肥六中、合肥八中、阜阳一中、淮北一中四校2019-2020学年高二上学期期末数学(理)试题
安徽省合肥市庐阳区合肥六中、合肥八中、阜阳一中、淮北一中四校2019-2020学年高二上学期期末数学(理)试题江西省新余一中、樟树中学等六校2019-2020学年高一下学期第二次联考数学(理,创新班)试题(已下线)拓展二 数列求和的方法(精练)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第二册(人教A版)
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9 .
的内角
的对边分别为
,已知
.
(1)求
;
(2)若
的面积为
,求
周长的最小值.
![](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/8e06ca3259b702e4068edb7f1352b365.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccf705227230b24c38d51329ec1aaad.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
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10 . 设A.B分别为双曲线
(a>0,b>0)的左.右顶点,P是双曲线上不同于A.B的一点,直线AP.BP的斜率分别为m.n,则当
取最小值时,双曲线的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f2cf0dc694e08e3fc56457e68465ca.png)
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2020-01-14更新
|
443次组卷
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2卷引用:安徽省合肥市庐阳区合肥六中、合肥八中、阜阳一中、淮北一中四校2019-2020学年高二上学期期末数学(理)试题