名校
解题方法
1 . 已知数列
是递增的等差数列,
,
是方程
的根.
(1)求数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dac77366c746161a381e0589d63e451.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2020-03-09更新
|
288次组卷
|
3卷引用:湖北省襄州一中、枣阳一中、宜城一中、曾都一中四校2019-2020学年高三上学期期中数学(理)试题
2 . 若关于
的不等式
和
的解集分别为
和
,则称这两个不等式为“对偶不等式”.若不等式
和不等式
为“对偶不等式”,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0527a896aec4a245945e5edee00deed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fee0af8e08d3f819c0cd66ce5b92459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc1bdcb45cd92ad8a777acc89c4c0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a0fdb5cfc0260ee851bf819d3973eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe556dc217cde50ee959c2ed98bbf742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
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2020-02-19更新
|
270次组卷
|
2卷引用:湖北省襄阳市2018-2019学年高一下学期期末数学试题
3 . 若
,
,
,则有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0e9d1ad9561d693958756ee8398218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-19更新
|
185次组卷
|
2卷引用:湖北省襄阳市2018-2019学年高一下学期期末数学试题
名校
4 . 在
中,角A,B,C的对边分别为a,b,c,且
.
求A和B的大小;
若M,N是边AB上的点,
,求
的面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcb0ae5ff9efc92275d1714f07b0b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07be2b587b4c87e3fc3090f5165c72e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599fa74fddd8015e645bf701879393b0.png)
您最近一年使用:0次
2020-01-01更新
|
3154次组卷
|
8卷引用:湖北省襄州一中、枣阳一中、宜城一中、曾都一中四校2019-2020学年高三上学期期中数学(理)试题
湖北省襄州一中、枣阳一中、宜城一中、曾都一中四校2019-2020学年高三上学期期中数学(理)试题2020届湖北省四校(襄州一中、枣阳一中、宜城一中、曾都一中)高三上学期期中考试数学(理)试题2020届福建省莆田第二十五中学高三上学期期中考试数学(理)试题(已下线)卷03-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》湖北省武汉市武昌实验中学2019-2020年高一下学期4月月考数学试题重庆市缙云教育联盟2020-2021学年高二下学期期末数学试题江西省新余市2021-2022学年高二上学期期末数学(文)试题江西省铅山县第一中学2021-2022学年高二下学期开学考试数学(理)试题
名校
5 . 设m、k为整数,方程
在区间
内有两个不相等的实数根,则
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7eb7a284aec8e4de05cc5852fcf157a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafe5c43e9a68885b36f84d44f5c6ecc.png)
A.![]() | B.![]() | C.3 | D.8 |
您最近一年使用:0次
2020-01-01更新
|
643次组卷
|
3卷引用:湖北省襄州一中、枣阳一中、宜城一中、曾都一中四校2019-2020学年高三上学期期中数学(理)试题
名校
6 . 下列四个命题:
函数
的最大值为1;
“
,
”的否定是“
”;
若
为锐角三角形,则有
;
“
”是“函数
在区间
内单调递增”的充分必要条件.
其中错误的个数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b2781c06deda24a6fb973f541fad47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876959b9f90f2379cf3d0927a8e31005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aaa2a2d80fae904461d89ca8fa1f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d972acc5e9edc9b0c9bbc73f9cc0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67773252101fb3704fdac88b5f3f1bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa4469ebd5c4981685f0a36e01d4583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74269cfb503e736149e1ac3165fcbafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5f421939ee855f25927e7570d82c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a960c992628ae3b85cae0a04112067ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
其中错误的个数是
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2020-01-01更新
|
581次组卷
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6卷引用:湖北省襄州一中、枣阳一中、宜城一中、曾都一中四校2019-2020学年高三上学期期中数学(理)试题
名校
7 . 设函数
,点
,设
,对一切
都有不等式
成立,则正整数
的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6201963fcdd54887f2af50518bd908a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd492173c23a42af96f0c9c13c201f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47e3f8de4cbc461bba749f840fc0af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165ca2c26138952afeec236e3921ace6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
名校
8 . 设实数x,y满足
,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6640f2096b2d0741f03432bebee6188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee51b0cac927e6445e4b94438c2ff3da.png)
A.![]() | B.![]() | C.2 | D.1 |
您最近一年使用:0次
2019-11-06更新
|
317次组卷
|
2卷引用:湖北省襄阳市第四中学2019-2020学年高三上学期9月联考数学(文)试题
名校
解题方法
9 . 在
中,角
的对边分别为
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37797bbf176c39f6df0850e8a54191d.png)
(1)求
的值;
(2)若
,
,求
的面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/b37797bbf176c39f6df0850e8a54191d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b246aa3b56becc905d3fb64c6d5ec4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f4f8020bef636dcb3b8dc5fa2bdbb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
解题方法
10 . 在各项均为正数的等比数列
中,若
,则
的值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5b2cf7fdaedbafedeb267c7fa35075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588ea0f3697c5adaaf11d65fc3cef70d.png)
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