名校
解题方法
1 . 已知a,b,c分别为
内角A,B,C的对边,下面四个结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.在锐角![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
昨日更新
|
509次组卷
|
2卷引用:吉林省通化市梅河口市第五中学2023-2024学年高一下学期6月月考数学试题
2 . 已知数列
的前n项和为
,且满足
,则
( )
![](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/234605545a58197b26d52799abbb17b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbdd2e3efbef1ff014df55b242eced.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7日内更新
|
457次组卷
|
3卷引用:吉林省通化市梅河口市第五中学2024届高考模拟预测数学试题
名校
解题方法
3 . 已知正项等差数列
的公差为2,前
项和为
,且
成等比数列.
(1)求数列
的通项公式
;
(2)若
求数列
的前
项和.
![](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/b91c13eaedd3a65b08e71d33a7a7c7a2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f05b1997d02b7483b7ece61061faba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b17a9b9bb8bf6bb9865e37f204da5c5.png)
您最近一年使用:0次
7日内更新
|
761次组卷
|
2卷引用:吉林省通化市梅河口市第五中学2024届高考模拟预测数学试题
4 . 对于正整数n,
是小于或等于n的正整数中与n互质的数的数目.函数
以其首名研究者欧拉命名,称为欧拉函数,例如
(
与
互质),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7cc0ad7521b5771950aea983f0c1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7cc0ad7521b5771950aea983f0c1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c9e69c7d5a3d7a5633a373a8a39544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786c6406780167f9744d0f9e9682e471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
A.若n为质数,则![]() | B.数列![]() |
C.数列![]() | D.数列![]() |
您最近一年使用:0次
7日内更新
|
267次组卷
|
3卷引用:吉林省通化市梅河口市第五中学2024届高三三模数学试题
吉林省通化市梅河口市第五中学2024届高三三模数学试题湖北省宜荆荆2024届高三下学期五月高考适应性考试数学试题 (已下线)高二数学期末模拟试卷02【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
5 . 已知正数m,n满足
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f0974ecbf06e833e087063db169001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
A.5 | B.6 | C.7 | D.8 |
您最近一年使用:0次
2024-06-13更新
|
369次组卷
|
2卷引用:吉林省通化市梅河口市第五中学2024届高考模拟预测数学试题
名校
6 . 设等差数列
的前
项和为
,若
,
,则
( )
![](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/a37bd079cf3329af20b2609b08c9f8c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab21d4c936a248b5a47d101d4ba41b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
A.![]() | B.36 | C.![]() | D.18 |
您最近一年使用:0次
2024-06-13更新
|
319次组卷
|
3卷引用:吉林省通化市梅河口市第五中学2024届高考模拟预测数学试题
7 . 已知数列
满足
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/651b05c4f2f3f750c2c77f0f4dd90245.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316a061744ea8475205205a19afd2b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b8d88cc1059a7b6d79944f5fcda983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc41a964cee9cff69c3b805afd29f086.png)
A.512 | B.678 | C.1010 | D.1022 |
您最近一年使用:0次
2024-06-11更新
|
609次组卷
|
5卷引用:吉林省通化市梅河口市第五中学2024届高三三模数学试题
吉林省通化市梅河口市第五中学2024届高三三模数学试题(已下线)高三数学考前押题卷3(已下线)安徽省合肥市第一中学2024届高三下学期三模数学试题2024届普通高招全国统一考试临考预测押题密卷数学试题(A卷)(已下线)【人教A版(2019)】高二下学期期末模拟测试A卷
8 . 定义1:若数列
满足①
,②
,则称
为“两点数列”;定义2:对于给定的数列
,若数列
满足①
,②
,则称
为
的“生成数列”.已知
为“两点数列”,
为
的“生成数列”.
(1)若
,求
的前
项和
;
(2)设
为常数列,
为等比数列,从充分性和必要性上判断
是
的什么条件;
(3)求
的最大值,并写出使得
取到最大值的
的一个通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7adb08bda4066fef731e23bf79f1df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](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/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5674d0988e7b344263916b230b844e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adee3a6709875bf6fd41f16b5115b486.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)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73933032b1598f4b10870291db9538d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68773e9560d4ecb08dac2d8163ead0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a5ca8276537bb6d7ae288eb5795a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a5ca8276537bb6d7ae288eb5795a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2024-05-09更新
|
311次组卷
|
3卷引用:吉林省通化市梅河口市第五中学2024届高三三模数学试题
名校
解题方法
9 . 记数列
的前
项和为
,若
,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/49e41476001dcc96db3774ad0fec3204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc625e19e7ca2b9d097f67a3d472e47.png)
A.590 | B.602 | C.630 | D.650 |
您最近一年使用:0次
2024-05-09更新
|
705次组卷
|
4卷引用:吉林省通化市梅河口市第五中学2024届高三三模数学试题
吉林省通化市梅河口市第五中学2024届高三三模数学试题安徽省皖豫名校联盟&安徽卓越县中联盟2024届高三联考5月三模数学试题(已下线)4.3.2等比数列的前n项和公式(2)(已下线)专题07 数列通项与数列求和常考题型归类--高二期末考点大串讲(人教B版2019选择性必修第三册)
名校
解题方法
10 . 已知数列
为等差数列,其首项为1,公差为2,数列
为等比数列,其首项为1,公比为2,设
,
为数列
的前
项和,则当
时,
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000f01319364c59dee948848fc4de4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1242bce7122127c9c1ba38eab216215f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.9 | B.10 | C.11 | D.12 |
您最近一年使用:0次