1 . 我们知道,二元实数对
可以表示平面直角坐标系中点的坐标; 那么对于
元实数对![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a79b7ec77425af9152ef0cd3dacfe9.png)
,
是整数
,也可以把它看作一个由
条两两垂直的“轴”构成的高维空间(一般记为
中的一个“点”的坐标表示的距离
.
(1)当
时, 若
,
,
, 求
,
和
的值;
(2)对于给定的正整数
,证明
中任意三点
满足关系
;
(3)当
时,设
,
,
,其中
,
,
,
.求满足
点的个数
,并证明从这
个点中任取11个点,其中必存在
个点,它们共面或者以它们为顶点的三棱锥体积不大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a79b7ec77425af9152ef0cd3dacfe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf1c689bacb131759ccd37e444a9479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837d6c4f226776680f464ae63f90a845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ebc8c7e32c1b561a908a36cfa2cbb5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567fc6dde8cea2eccafe83048ed9b650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445fa8fa15fbb33d26fff11f18113cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cdfd65ee99c3d93adee6732ae125eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1740273d1682d06d35e35a733225613d.png)
(2)对于给定的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93de25834c572256e25333010fbda97b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1898f935cafa18dc3e7ea4cea8b46df.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a42bc893aeabafad84da3e66e73f885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58dcb69f052798e9238906eb18031a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b82ad92798b264062c062f4a9a1a5c.png)
![](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/72551dcd7eb2722ee2ef5f5054a751e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7135c6c4b5aa75a8efa8171dbba42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
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名校
2 . 已知函数
,若
在
上恒成立,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d916b7145fb85cdfe34832a799316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5931095eb29d9d6b55ed9fa32a4ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-11-11更新
|
181次组卷
|
2卷引用:北京市第九中学2021-2022学年高一上学期期中考试数学试题
3 . 已知集合
,定义
上两点
,
的距离
.
(1)当
时,若
,
,求
的值;
(2)当
时,证明
中任意三点A,B,C满足关系
;
(3)当
时,设
,
,
,其中
,
.求满足P点的个数n,并证明从这n个点中任取11个点,其中必存在4个点,它们共面或者以它们为顶点的三棱锥体积不大于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a2c2ed6f079f1eb83efd745348e3a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305992016871e75864ad17004e38e95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38571677d95dba51665ab4d260cba322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f71f720b0e498f397ccdd813649f661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ebc8c7e32c1b561a908a36cfa2cbb5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567fc6dde8cea2eccafe83048ed9b650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85067c53e936ef32da818efe04bdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1898f935cafa18dc3e7ea4cea8b46df.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a42bc893aeabafad84da3e66e73f885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58dcb69f052798e9238906eb18031a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b82ad92798b264062c062f4a9a1a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b24df959122a377fad9845e9d8621ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7135c6c4b5aa75a8efa8171dbba42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
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4 . 已知函数
.记
的最大值为
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ab8aee21231ab727182e6b0a4dd3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760f804646698060703c5458ff5637c7.png)
您最近一年使用:0次
2021-06-05更新
|
210次组卷
|
2卷引用:2021年清华大学文科营暨工科营(冬令营)数学试题
名校
解题方法
5 . 已知函数
.
(1)当
,求
的取值范围;
(2)若
,对
,都有不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aff949c7b72b50419bcf3bc3bb96aaa.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a180ae4e42eace1dd8c5916c78c33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e78c4276f9bee13a5c36b7f41b2693a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db757c029d17a7aab0338e718a9e25aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-08-04更新
|
536次组卷
|
29卷引用:北京市人大附中2018届高三第二次模拟考试理科数学试题
北京市人大附中2018届高三第二次模拟考试理科数学试题广东省佛山市普通高中2018届高三教学质量检测(一)数学(文)试题广东省佛山市普通高中2018届高三教学质量检测(一)数学(理)试题河南省南阳市第一中学2018届高三第九次考试数学(理)试题湖北省重点高中联考协作体2018届高三春季期中考试数学(理)试题【全国市级联考】河南省濮阳市2017-2018学年高二下学期升级考试数学(文)试题【全国百强校】山西省运城市康杰中学2018届高考模拟(四)数学(文)试题【全国百强校】山西省运城市康杰中学2018届高考模拟(四)数学(理)试题【全国百强校】福建省厦门外国语学校2018届高三下学期5月适应性考试(最后压轴模拟)数学(理)试题【全国百强校】福建省莆田市第一中学2019届高三上学期第一次月考数学(理)试题四川省成都市龙泉驿区第一中学校2019届高三12月月考数学(理)试题【市级联考】湖南省长沙市2019届高三上学期统一检测文科数学试题【市级联考】湖南省长沙市2019届上学期高三统一检测理科数学河南省郑州市第一中学2019-2020学年高三上学期12月月考数学(理)试题(已下线)2020届高三12月第03期(考点14)(文科)-《新题速递·数学》2020届辽宁省大连市第二十四中学高三4月模拟考试数学(理)试题西藏自治区拉萨那曲第二高级中学2019-2020学年高三第四次月考数学(文)试题西藏拉萨那曲第二高级中学2019-2020学年高三第四次月考数学(理)试题辽宁省大连市第二十四中学2020届高三6月高考模拟(最后一模)数学(文)试题辽宁省沈阳市第二中学2020届高三下学期第五次模拟考试数学(文)试题辽宁省大连市第二十四中学2020届高三6月高考模拟(最后一模)数学(理)试题辽宁省沈阳二中2020届高三高考数学(文科)五模试题(已下线)专题23 不等式选讲-2020年高考数学(理)母题题源解密(全国Ⅲ专版)(已下线)专题23 不等式选讲-2020年高考数学(文)母题题源解密(全国Ⅲ专版)江西省新余市2021届高三上学期期末统考数学(理)试题(已下线)重难点 07 选考系列-2021年高考数学(理)【热点·重点·难点】专练(已下线)重难点 07 选考系列-2021年高考数学(文)【热点·重点·难点】专练四川省泸州市泸县第二中学教育集团2022届高考仿真考试(三)理科数学试题四川省泸州市泸县第二中学教育集团2022届高考仿真考试(三)文科数学试题
名校
解题方法
6 . 给出下列四个函数:①
;②
;③
;④
,其中值域为
的函数的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b629bea8e22de9bfc49158e2289871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e4ee67cc690aa7f9d4a5c29c8ef39b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2928b8abccc5c6cfb5d6511c22168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dbd66b2af62ffab9b988032341a910c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
您最近一年使用:0次
2020-08-03更新
|
391次组卷
|
5卷引用:北京市通州区2020届高考一模数学试题
北京市通州区2020届高考一模数学试题(已下线)专题13 函数及其性质-2020年高考数学母题题源解密(北京专版)内蒙古集宁一中2019-2020学年高二下学期第三次月考数学(理)试题(已下线)专题11 函数性质的综合运用-2020年高考数学(理)母题题源解密(全国Ⅱ专版)(已下线)专题12 函数性质的综合运用-2020年高考数学(文)母题题源解密(全国Ⅱ专版)
名校
解题方法
7 . 已知
,若集合
中的元素有且仅有2个,则实数
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0014d78b1c5ca5da433c65b454b4c80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-06-08更新
|
1293次组卷
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8卷引用:专题01 集合的表示及其运算-2020年高考数学母题题源解密(北京专版)
(已下线)专题01 集合的表示及其运算-2020年高考数学母题题源解密(北京专版)浙江省绍兴市嵊州市2018届高三下学期第二次高考适应性考试数学试题浙江省杭州市高级中学2020届高三下学期教学质量检测数学试题(已下线)专题01 1.1.1集合的含义与表示(重点练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版必修1)(已下线)专题01+1.1集合的含义与表示(重点练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版2019必修第一册)浙江省杭州高中2020届高三下学期5月高考质检数学试题第1章+集合与逻辑(能力提升)-2020-2021学年高一数学(必修一)单元测试定心卷(沪教版2020)(已下线)专题14 不等式选讲-【备战高考】2021年高三数学高考复习刷题宝典(填空题专练)
8 . 已知集合
(
).对于
,
,定义
;
(
);
与
之间的距离为
.
(Ⅰ)当
时,设
,
.若
,求
;
(Ⅱ)(ⅰ)证明:若
,且
,使
,则
;
(ⅱ)设
,且
.是否一定
,使
?说明理由;
(Ⅲ)记
.若
,
,且
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e423803a7eceeb306d9020fdb86ddc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfb4290cab93c0521d2596031625448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d22720c8b8fbbf1b8e4406400b135f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5200656a5ed2197cabde9c99afcf33ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83919f9b83559bd5d1db0b9256a2524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e87088da41685cc8d433fbbe0e18d6.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/badd0969b43deabb1e8f3fcca73ce1c5.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45cf86650443d1b86c79b1e3edc7e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af388e3a6185f4e6e2a7db5dba6e1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f68a89451ca87d57d88d786c23d484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f6e0e6a7cd9b3ec681407e10b44901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(Ⅱ)(ⅰ)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81345ca73b711411e665820b5672913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559305e1e35d369f1d056bb4191a23aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a47d9b859a3ca077f7fc1a4cdc5b5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3153bbcedc215adf208c82b65c8e6eff.png)
(ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81345ca73b711411e665820b5672913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3153bbcedc215adf208c82b65c8e6eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559305e1e35d369f1d056bb4191a23aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a47d9b859a3ca077f7fc1a4cdc5b5d6.png)
(Ⅲ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003fbb029cdb6d5d7f93e29dca371f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a3b20462ba83086d0711a25ed83bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b39ca902e466d5b24d13846b3bc4a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4a2681390214200443ae07c01a4abe.png)
您最近一年使用:0次
2020-05-19更新
|
933次组卷
|
5卷引用:2020届北京市第四中学高三第二学期数学统练1试题
(已下线)2020届北京市第四中学高三第二学期数学统练1试题北京市第二中学2020~2021学年高一下学期第四学段考试数学试题北京市第二中学2021-2022学年高一下学期第四学段考试数学试题北京景山学校2023-2024学年高一(1,2,3班)下学期期中考试数学试题(已下线)重难点01平面向量的实际应用与新定义(3)
9-10高二下·北京·阶段练习
解题方法
9 . 不等式
的解集为
,则
的取值范围是______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b189affefec1ad0ae5a3cc6cbda4d151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
您最近一年使用:0次
2010·广东·三模
名校
10 . 若对任意
,
有唯一确定的
与之对应,则称
为关于
,
的二元函数,现定义满足下列性质的
为关于实数
,
的广义“距离”.
(
)非负性:
,当且仅当
时取等号;
(
)对称性:
;
(
)三角形不等式:
对任意的实数
均成立.
给出三个二元函数:①
;②
;③
,
则所有能够成为关于
,
的广义“距离”的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc4d5f4cc4f20f44adbae0d2373681b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c3c1ed4fb65ab9505ad8078d8d0fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c3c1ed4fb65ab9505ad8078d8d0fb5.png)
![](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/f1c3c1ed4fb65ab9505ad8078d8d0fb5.png)
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638df541efb3448608fbad59195e7c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0d10d93a4cd75d6987cffce7ce7a84.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb1647c7592d692093ccb10ba99ff0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
给出三个二元函数:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f322b17f7284251845f84b376f2ec134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6820cb93dea9eb8430dc184664acb4b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c112be1d02723667d2932f0b18eab7ed.png)
则所有能够成为关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2017-12-24更新
|
740次组卷
|
4卷引用:北京市西城区44中2018届高三上12月月考数学试题
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