1 . 已知首项为
的正项数列满足
满足
,若存在
,使得不等式
成立,则
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02cf0752fc5bcf7c7af431ee56e9ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2771c5f04582c545e0f9afc8a2cb9597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37c4d009d6130c16a2c5f120c8deb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2024-05-29更新
|
600次组卷
|
2卷引用:江西省南昌市第十九中学2024届高三下学期第四次模拟考试数学试卷
2 . 对于数列
,定义“
变换”:
将数列
变换成数列
,其中
,且
.这种“
变换”记作
,继续对数列
进行“
变换”,得到数列
,依此类推,当得到的数列各项均为0时变换结束.
(1)写出数列
,经过6次“
变换”后得到的数列;
(2)若
不全相等,判断数列
经过不断的“
变换”是否会结束,并说明理由;
(3)设数列
经过
次“
变换”得到的数列各项之和最小,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e2d39195e5945c62fc776dcfbb0b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af5fd5764f190dacd5e924c1af8c74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f44d6e929223f8bdef1c028f82301e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e374762fa02d95091036d3d4df4e590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a45c538cfbb59c7c8b58dbbfbabf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81a9ae8e076e39345d58582b8fc21a2.png)
(1)写出数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302499e30cd0bec7e2d6e5826f787766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e61cb2b20a631726c8876182000b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c791be794c2627def012d18bf1f99c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
名校
解题方法
3 . 已知数列
的前
项和为
,满足
;数列
满足
,其中
.
(1)求数列
的通项公式;
(2)对于给定的正整数
,在
和
之间插入
个数
,使
,
成等差数列.
(i)求
;
(ii)是否存在正整数
,使得
恰好是数列
或
中的项?若存在,求出所有满足条件的
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/83fd67e206753eff52406291c19daa38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23f7f601ad9971d3de3e2dd820642e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0197eeeeaafec6b1fdd7bb8509572f6b.png)
(2)对于给定的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd6f136f7c8d27b406c0993dcfece54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b8d5b6045219ea4527202ab131bb2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417083c7157cf0b45befc7c537f1012c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629e172f62f389ea84b7d771c1c27566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a039f1df440117fe89030a4ad6dcf291.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22be6bbf70b5c135edaf8db69118cb50.png)
(ii)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75ed0812322ed46d25ec41f609674be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2024-03-19更新
|
2010次组卷
|
6卷引用:江西省吉安市第一中学2024届高三下学期期中考试数学试题
4 . 已知
,关于x的不等式
的解集为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a42fff822c5f61fec5fcd5c8e86941e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e080d3d338e4398d91b493797eb8ce33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e0a0dde137e24c80d0afeec024f2b6.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-03-14更新
|
829次组卷
|
2卷引用:江西省九江市同文中学多校联考2024届高三下学期3月月考数学试题
解题方法
5 . “奔驰定理”因其几何表示酷似奔驰的标志得来,是平面向量中一个非常优美的结论.奔驰定理与三角形四心(重心、内心、外心、垂心)有着神秘的关联.它的具体内容是:已知M是
内一点,
,
,
的面积分别为
,
,
,且
.以下命题正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e8ecb371ce77dca5554e8e03b41386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4b0c4b339f44bbac0e275eb0718234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319b6a5373bc8eb13772b8e6d047779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea3c7cd2f23b4521e64a7e64844ec48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089e8a7f6c535fc3cd270af428d55f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3afa82e5fe030c75811189079efa4bd.png)
A.若![]() ![]() |
B.若M为![]() ![]() |
C.若M为![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024·全国·模拟预测
名校
解题方法
6 . 已知定义域为R的函数
满足
,且函数
是奇函数,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007252809474ea4dc30a7bfbfa24ed23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803e878a0384869f4ef5fa672574884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b853362c57d13c8bd472610c6e886c72.png)
A.函数![]() |
B.![]() |
C.函数![]() |
D.若![]() ![]() |
您最近一年使用:0次
2024-01-06更新
|
1230次组卷
|
4卷引用:江西省南昌市第二中学2024届高三“九省联考”考后适应性测试数学试题(四)
江西省南昌市第二中学2024届高三“九省联考”考后适应性测试数学试题(四)(已下线)2024年普通高等学校招生全国统一考试数学预测卷(九)(已下线)专题4 抽象函数问题(过关集训)(压轴题大全)广东省广州市华南师大附中2024届高三上学期大湾区数学预测卷(一)
7 . 如果无穷数列
是等差数列,且满足:①
、
,
,使得
;②
,
、
,使得
,则称数列
是“
数列”.
(1)下列无穷等差数列中,是“
数列”的为___________;(直接写出结论)
、
、
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
、
、
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
、
、
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
、
、
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
(2)证明:若数列
是“
数列”,则
且公差
;
(3)若数列
是“
数列”且其公差
为常数,求
的所有通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29941e993000d419b14c0d4e925f5b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b3a3baa88a51e1dbedf37e4d977e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b698f875cfb478d3c601d3de4f71a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93946d0c837a3f1db7fa127218d2ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfda8a67a8d92ec8809c8e76bd7e45a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48d21d10197c3d078db9d1ac9293e79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b3a3baa88a51e1dbedf37e4d977e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93946d0c837a3f1db7fa127218d2ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(1)下列无穷等差数列中,是“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b321556cdf2496c22aae75453a52433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09794316b88ac54a4d9e08c57f918346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d313fd69bb1d3007786ab5b48f117b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e1f9a90aaf2ce171f1d89bac40c3016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
(2)证明:若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f350a798b076e55ad197897a9a934a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280a3ac81959ffcd56a4304b61c683b8.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5c65abd6c446e79ea64cdce1bc6834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2022-04-07更新
|
2341次组卷
|
9卷引用:黄金卷03(2024新题型)
(已下线)黄金卷03(2024新题型)北京市第八中学2023-2024学年高二下学期期中练习数学试题北京市西城区2022届高三一模数学试题(已下线)临考押题卷03-2022年高考数学临考押题卷(北京卷)北京市第八中学2023届高三上学期8月测试二数学试题北京市一零一中学2023届高三下学期统练数学试题(一)北京卷专题18数列(解答题)北京市昌平区第二中学2022-2023学年高二下学期期中数学模拟练习试题(已下线)专题5 等差数列的单调性和前n项和的最值问题 微点1 等差数列的单调性
8 . 今有一个“数列过滤器”,它会将进入的无穷非减正整数数列删去某些项,并将剩下的项按原来的位置排好形成一个新的无穷非减正整数数列,每次“过滤”会删去数列中除以
余数为
的项,将这样的操作记为
操作.设数列
是无穷非减正整数数列.
(1)若
,
进行
操作后得到
,设
前
项和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
①求
.
②是否存在
,使得
成等差?若存在,求出所有的
;若不存在,说明理由.
(2)若
,对
进行
与
操作得到
,再将
中下标除以4余数为0,1的项删掉最终得到
证明:每个大于1的奇平方数都是
中相邻两项的和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2db096d683f869f67d53bfbc0e759cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd54ff3a3c052b260907774f5ec2e897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983628eb126ac604d4586fdd181d6f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e43291fc522f7e586029d9fe8fc4422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
②是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dff319b7da38c9f89f25278f84883dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e726f2fda6ba420750c81041b9275a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616110875a674497c7e2331b872940e6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c75ae8507f8658a01f581715566c96a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ae8420e018bc00b53c8e34cb2c7a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b3f7806d0a60ea224cfeee962bb207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
2020-03-25更新
|
659次组卷
|
5卷引用:江西省全南中学2023-2024学年高二下学期3月月考数学试卷
名校
9 . 对于无穷数列
,“若存在
,必有
”,则称数列
具有
性质.
(1)若数列
满足
,判断数列
是否具有
性质?是否具有
性质?
(2)对于无穷数列
,设
,求证:若数列
具有
性质,则
必为有限集;
(3)已知
是各项均为正整数的数列,且
既具有
性质,又具有
性质,是否存在正整数
,
,使得
,
,
,…,
,…成等差数列.若存在,请加以证明;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3cb1321c970c49c9f6a5635ac23d6a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99699ac8106034f647e4f460b3bf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa8264eb8eea3025a152318df8720b1.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e836ef3b31693dcaf25b414277e8ae8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d8f894492a8126f5f133dec4cd68833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c414a10d73f453fc1109e5b2243d2369.png)
(2)对于无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926b0a2429ebf269f7e9368ac0306956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e691589e9aafddefcbb613c7030f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bea0dd7e474bcd04db2544427ba0488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7470297de40027847c5c73fc5d1719c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7334c46af837676ada9575630a48d60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0699adb388000a87241d6b113e733cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969293569368540b9517380795cb571b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfaf6fb5cd9a53f7adc324976735b9a.png)
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