23-24高一上·上海·期中
名校
1 . 对于正整数
,定义
.对于任意的
,称
为
的第
个分量,称
是
的一个“协同子集”.如果
同时满足:①
的元素个数不少于
;②对于任何
、
、
,存在
,使得
、
、
的第
个分量都是
.
(1)对于
,若
是
的一个恰好含有四个元素的“协同子集”,且其中两个元素是
和
,直接写出另外两个元素;
(2)证明:若
是
的一个“协同子集”,则
的元素个数不超过
;
(3)证明:若
是
的一个“协同子集”,且
的元素个数恰好是
,则存在唯一的
,使得
中所有元素的第
个分量都是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d3dc6cad699aa2713482c9f4306802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6aa5d5b774230400311326853ed898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a86c79fb771a07a413c755e4295b160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01433c50807a7878f60c05f43c3fa652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(1)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9154d05e636d76f2726e226a5ef3d7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b01af54049b27ca6e8159518b7b18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968b3f41b9a2f481de4b9d95547c5423.png)
(2)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f1ad18371ec533aeac27cf1fad95c1.png)
(3)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f1ad18371ec533aeac27cf1fad95c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e1f6f6f70deeead9aa004fe0697323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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2 . 若集合
具有以下性质:
①
;
②若
,则
,且
时,
.
则称集合
是“好集”.
(1)分别判断集合
,有理数集
是否是“好集”,直接写出结论;
(2)设集合
是“好集”,求证:若
,则
;
(3)设集合
是“好集”,求证:若
,则
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c9b39503b6484104862e21772b1431.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e13a814f8e081078dcf3788177affcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46de01c5104b9112a688df37eadb000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd77104cc745d1e0e262122da34482d.png)
则称集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)分别判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05551b1d4b65f27a932c33ddb1cb6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e680c82535270feea54ec5cc81fcc99.png)
(2)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e13a814f8e081078dcf3788177affcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/957d41dbe52b49c3a7339e3519a3fe84.png)
(3)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b5cf69ccf1e1bed63531e804fd03a2.png)
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解题方法
3 . 已知集合
,其中
且
,若对任意的
,都有
,则称集合
具有性质
.
(1)集合
具有性质
,求
的最小值;
(2)已知
具有性质
,求证:
;
(3)已知
具有性质
,求集合
中元素个数的最大值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd70e76e1780a839fcbff88cd71c2fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac10f1abfec87624afd60003af4eaddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5269913f25626c9615a0851c59c20d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2aa8c7598aa438022d7ff0db9a3de7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e86a882ef57f44f0ad22836079afe1.png)
(1)集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f65336695f80a1fe2a7838a3ae17c51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32efe4eff75508cb93e828c735dcb695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353433462b58fe2eba495f2589b81380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2be2cef8c6e56b2381acca7f3c0cf4.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353433462b58fe2eba495f2589b81380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
2023-10-12更新
|
1790次组卷
|
5卷引用:重庆市第一中学校2023-2024学年高一上学期10月月考数学试题
2023高一·全国·专题练习
名校
解题方法
4 . 在集合论中“差集”的定义是:
,且
(1)若
,
,求
;
(2)若
,
,求
;
(3)若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f4bcaec7926363d8f77c6e773920d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b998f1e3675e0fa3b790c416a751af63.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9e6ad1166c7625e63b80e75b2fb1d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2755a85584173902f146eacf40102723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26cb7961d2d6957cfd6b4af403450e5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6846ad147da3f53658602eade09631d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7321a9fa7a6ef6be6e40c96709763930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6846ad147da3f53658602eade09631d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe3404ade72e644b48d19572c173c93.png)
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5 . 已知n元有限集
(
,
),若
,则称集合A为“n元和谐集”.
(1)写出一个“二元和谐集”(无需写计算过程);
(2)若正数集
是“二元和谐集”,试证明:元素
,
中至少有一个大于2;
(3)是否存在集合中元素均为正整数的“三元和谐集”?如果有,有几个?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9e56ab45ddf991ae24983027e04b08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf910f82c3094b267a3d481d23d829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a886e3d7d448ea2f360c6160c087fec6.png)
(1)写出一个“二元和谐集”(无需写计算过程);
(2)若正数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a419b26f7e9c3325eb115189a1519f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
(3)是否存在集合中元素均为正整数的“三元和谐集”?如果有,有几个?请说明理由.
您最近一年使用:0次
2023-10-25更新
|
171次组卷
|
2卷引用:安徽铜陵市第一中学2023-2024学年高一上学期10月月考数学试题
名校
6 . 设集合
为非空数集,定义
.
(1)若集合
,直接写出集合
及
;
(2)若集合
且
,求证
;
(3)若集合
且
,求
中元素个数的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e32ae0e537ab483485e3dc6628b2f3a.png)
(1)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265e81e52218232e16c78f57b3aa0de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b26ea9b3e6e286874c5dca1badea723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16289945d1d1c529fb1bfd4d828f413.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77239c98c78a026cc03336edca067ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9473a5974fa9c4286f90f6a3637411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1868c8a0db983c9cc2695294fa03b1.png)
(3)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce46889ee6889ca41c5bd19eaf0e242f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4d331fa6921e8ebc0b1fc4affd22ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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2024高三·全国·专题练习
名校
7 . 已知数集
及定义在该数集上的某个运算(例如记为“*”),如果对一切
,都有
,那么就说,集合
对运算“*”是封闭的.
(1)设
,判断
对通常的实数的乘法运算是否封闭?
(2)设
,且
,问
对通常的实数的乘法是否封闭?试证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ec043ebe0cc875c2d222431f0e73a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99176fbe8d266b97cc25ecf0c1bc52e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46144e18dadae0f4dda0267cb29f7d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640bd986238e885d5a95cb50fe53da49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d2698f5839167452e694e57527046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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8 . 已知集合
,设
是
的至少含有两个元素的子集,对于
的任意两个不同的元素
,若
都不能整除
,则称集合
是
的“好子集”.
(1)判断数集
与
是否是集合
的“好子集”,并说明理由;
(2)证明:若
是
的“好子集”,则对于
中的任意两个不同的元素
,都有
;
(3)求集合
的“好子集”
所含元素个数的最大值,并写出取到元素个数最大值时的
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54730b349603779705381ecfaa3d114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e2f1ee19bfd9953867afa426375688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059d6df06a5b85848dc4fa33327f8e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(1)判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef27cd09f4ecc055fd7e72b3b368e5df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91edb18f49d6acc68a3d8d1a1be6a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e2f1ee19bfd9953867afa426375688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4be7ed8ae7440b7b7efae8889cc510.png)
(3)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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解题方法
9 . 设整数集合
,其中
,且对于任意
,若
,则
.
(1)请写出一个满足条件的集合A;
(2)证明:任意
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab8bf709a13b3d6cea5bf2b05c92019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1c5d7e92a7d6c61e007cd9313b1b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b836bde5106e78caeb728ff3353bee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269c7a915fc171ac7ad84c09883a6dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1250b7f54f3a23a5e52b2e4aa0fc0050.png)
(1)请写出一个满足条件的集合A;
(2)证明:任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361b9733dc8c4896ce0501d1a3ddf3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7848c89302a41e9576530313fc3e61b8.png)
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10 . 已知数集
(
,
)具有性质
:对任意的
,
(
),
与
两数中至少有一个属于
,(如
与
中至少有一个属于
).
(1)分别判断数集
和
是否具有性质
,并说明理由;
(2)求
的值;
(3)设正整数集合
(
,
)具有性质
,证明:对任意
(
为正整数),
都是
的因数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a3f24673b6e954db3a8b229d8c4564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec089f9d4b5d8a70cb2ecfd8f1678c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ae331839bce8f3c14d7efd7f9d8915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f52783e7a39f438adf08ef7d05d8c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf9fc9e8c9940547678ff7934363f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c00b1aaa1b31dbfc8f8b904f6f25dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fb3b69403fe5307601f073d8b271a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)分别判断数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd5556ed59bb2c223833259a42890ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5038b4f82da68c008ade7275ad241993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(3)设正整数集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bacfbe332324e9d2447feb74a869aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05bc5d045516472a12d9dcdab97a3f0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef835c9ad2636a9662fb6c99e3abc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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