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1 . 在
中,
为锐角,
,且对于
,
的最小值为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f195ce14eefef2f0f843575dbf7ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf039c46a25e331446c6ee1e9af3c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565abcde9877058cf4c7251860ed814e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49aff617a7f7d3f291a56baf6a6bfa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcce17e4c333353b8b694d0713a581e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:甘肃省定西市临洮中学2023-2024学年高一下学期第一次月考数学试卷
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解题方法
2 . 如图是构造无理数的一种方法: 线段
; 第一步,以线段
为直角边作直角三角形
,其中
; 第二步,以
为直角边作直角三角形
,其中
; 第三步,以
为直角边作直角三角形
, 其中
; ...,如此延续下去,可以得到长度为无理数的一系列线段, 如
,
, ... ,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780236b507e42bf180d15faca13d9478.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee5747ae1c372be1170242c4aecee5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4195334905e2f190f958dbf5951456f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c42451af24f0fd7dba027b7982ee7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92777fd37c34b8747686db17b0098419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c76916c6ff302cf4fb4b6ace5bb3a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5b7c627e5932a413b34ff3f597b5ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ba4bf41f103d2b8973840ec472938a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181f7b988095b7285557491c7bb2fb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23de2a59f81db67daf4f44b51771b9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7365cf0d1e0f5460dd26b4122345b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c76916c6ff302cf4fb4b6ace5bb3a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181f7b988095b7285557491c7bb2fb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780236b507e42bf180d15faca13d9478.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/8150aec8-ba3b-435c-8d6e-bd131db2c114.png?resizew=199)
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2022-09-08更新
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1134次组卷
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6卷引用:甘肃省张掖市某重点校2022-2023学年高一下学期3月月考数学试题
名校
3 . 已知向量
,
满足
,
,且
,
的夹角为
.
(1)若
,求实数
的值;
(2)求
与
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3f8682540cd84c62e6fa835cd02f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16d81d266f24698696a81ed5e007680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3b2d03f9b0d5895ca0a63b6f9fb1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
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2022-07-24更新
|
774次组卷
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8卷引用:甘肃省张掖市某重点校2022-2023学年高一下学期6月月考数学试题
甘肃省张掖市某重点校2022-2023学年高一下学期6月月考数学试题陕西省榆林市府谷中学、绥德中学2021-2022学年高一下学期第二次月考数学试题黑龙江省哈尔滨市六校2021-2022学年高一下学期期末联考数学试题河北省保定市曲阳县第一中学2023届高三上学期9月摸底数学试题专题2.2 平面向量的数量积运算-2021-2022学年高一数学北师大版2019必修第二册专题2.7 平面向量及其应用(基础巩固卷)-2021-2022学年高一数学北师大版2019必修第二册陕西省铜川市第一中学2021-2022学年高二下学期期末文科数学试题(已下线)模块二 专题5《平面向量与复数》单元检测篇 A基础卷 (人教A)
名校
4 . 某人用下述方法证明了正弦定理:直线
与锐角
的边
,
分别相交于点
,
,设
,
,
,
,记与
方向相同的单位向量为
,
,∴
,进而得
,即:
,即:
,钝角三角形及直角三角形也满足.请用上述方法探究:如图所示,直线
与锐角
的边
,
分别相交于点
,
,设
,
,
,
,则
与
的边和角之间的等量关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd37b64af6bbdbf18adf222b8a5865ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16bb3a16b0ba9528ddb20ff10a00899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2cf03ac7a1b0aba75daa3b9f9b5768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d753a0a27ec4302346bcee918ebd3e50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2576887d9f2c5742cff532d434add601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2794d98ca81e71204f4a9d511d73335e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650532c3b1583435ca11c455a86de314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c2e9c16417a5dc79ed79b5840c58cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea39f12cc59ecb30dd6c31f1ed1011b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd37b64af6bbdbf18adf222b8a5865ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad21f3682a4949e36a2c18fac6a5807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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7卷引用:甘肃省张掖中学2023-2024学年高一下学期4月月考数学试卷
甘肃省张掖中学2023-2024学年高一下学期4月月考数学试卷重庆市七校2021-2022学年高一下学期期末数学试题(已下线)模块四 专题5 期末重组综合练(重庆)海南省海口市海南中学2024届高三上学期第四次月考数学试题重庆市九龙坡区育才中学2023-2024学年高一下学期寒假检测定时训练数学试题(已下线)6.4.3.2?正弦定理15种常考题型归类(1)-高频考点通关与解题策略(人教A版2019必修第二册)(已下线)6.4.3.2 正弦定理——课后作业(巩固版)
名校
5 . 已知非零向量
,
的夹角为
,现定义一种新运算:
.若
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79002275d5692e2f316a7e5cf6d9b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390d8a305ea693fbc8f70b52a81ae33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca155e583f3cb36347a72efb5476b93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c394e2a9b9c0042979987e680062ccc.png)
A.![]() ![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
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7卷引用:甘肃省兰州第一中学2023-2024学年高一下学期3月月考数学试题
解题方法
6 . 已知向量
,
满足
,
,且
,
的夹角为
.
(1)求
;
(2)若
,求实数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1495800fec31d9bb572e7a75067deff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18d98d099973d39e45407567b592ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00dc41c3dd21642ce92f525f6699f160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcca10d53641254c32bd4f03306ffe55.png)
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解题方法
7 . 如图,在
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955750261260288/2958854152445952/STEM/19f500dc-b765-415b-b83f-df58a2b5f5ac.png?resizew=210)
(1)求
;
(2)已知点D是AB上一点,满足
,点E是边CB上一点,满足
.
①当
,求
;
②是否存在非零实数
,使得
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c278812c4813f6391c7993574e2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59ab6bf6111dda4a3d428454768b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955750261260288/2958854152445952/STEM/19f500dc-b765-415b-b83f-df58a2b5f5ac.png?resizew=210)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea35838975a3f7db1f3b82241ff87dc.png)
(2)已知点D是AB上一点,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0d53573554894dbe3b31027d7cdfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e513fd59e59bda50100de1b4571a235.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c174f127b7234ebb6a87d9185bd2210.png)
②是否存在非零实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c47c25136e592e22c28008ea5b74e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2022-04-15更新
|
1002次组卷
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24卷引用:甘肃省张掖市高台县第一中学2021-2022学年高一下学期4月月考数学试题
甘肃省张掖市高台县第一中学2021-2022学年高一下学期4月月考数学试题山东省淄博市第七中学2019-2020学年高一3月线上考试数学试题江苏省南京市第一中学2020-2021学年高一下学期3月月考数学试题江苏省无锡市江阴市第一中学2020-2021学年高一下学期3月月考数学试题江苏省淮安市郑梁梅高级中学等六校联盟2020-2021学年高一下学期第六次学情调查数学试题福建省宁化第一中学2020-2021学年高一下学期第一次月考数学试题重庆市万州高级中学2021-2022学年高一下学期3月月考数学试题重庆市沙坪坝区凤鸣山中学2022-2023学年高一下学期月考数学试题湖北省武汉市第十一中学2023-2024学年高一下学期3月月考数学试卷【全国校级联考】山西省沁县中学2017-2018学年高一下学期期中考试数学试卷人教A版(2019) 必修第二册 过关斩将 第六章 6.2 平面向量的运算 6.2.4 向量的数量积湖北省武汉市华师一附中2019-2020学年高一下学期期中数学试题(已下线)【新东方】双师202高一下(已下线)【新东方】双师174高一下(已下线)江苏省南通市如皋市2020-2021学年高一下学期期初开学模拟考试数学试题江苏省扬州市邗江区、宝应县、仪征市2020-2021学年高一下学期期中联考数学试题江苏省无锡市市北高级中学2021-2022学年高一下学期期中数学试题苏教版(2019) 必修第二册 过关斩将 第9章 本章达标检测2023版 湘教版(2019) 必修第二册 过关斩将 第1章 1.5 向量的数量积 1.5.1 数量积的定义及计算(已下线)北京市大兴区北京亦庄实验中学2022-2023学年高一下学期第3学段教与学质量诊断数学试题宁夏银川三沙源上游学校2022-2023学年高一下学期期中考试数学试题福建省泉州科技中学2022-2023学年高一下学期期中考试数学试题(已下线)高一下学期期末真题精选(压轴60题20个考点专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)广东省奥林匹克中学2021-2022学年高二上学期开学考数学试题
解题方法
8 . (多选题)定义两个平面向量的一种新运算:
=|
||
|sin〈
,
〉,其中〈
〉表示
,
的夹角.则对于两个平面向量
,
,下列结论一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecf874a70b9321d135e7528b880e2bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.![]() | B.(![]() ![]() ![]() ![]() |
C.λ(![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-04-15更新
|
399次组卷
|
3卷引用:甘肃省酒泉市实验中学2021-2022学年高一下学期3月月考数学试题
甘肃省酒泉市实验中学2021-2022学年高一下学期3月月考数学试题湖北省武汉市第四十三中学2021-2022学年高一下学期期中数学试题(已下线)【2023】【高二下】【期中考】【366)】【高中数学】【陈秀秀收集】
名校
9 . 在
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54471394518f41a582b93f771d364f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4995ec65d0748dfeedc9068e0a5f2c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-04-11更新
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609次组卷
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4卷引用:甘肃省天水市第一中学2021-2022学年高一下学期第一阶段考试数学试题
名校
解题方法
10 . 如图,在
中,已知
,
,
,点D是
上一点,满足
,点E是边
上一点,满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e513fd59e59bda50100de1b4571a235.png)
![](https://img.xkw.com/dksih/QBM/2022/3/11/2934043967733760/2938047420350464/STEM/eb78ca6b-0562-41ff-a8ab-44726c74118d.png?resizew=204)
(1)当
时,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c174f127b7234ebb6a87d9185bd2210.png)
(2)是否存在非零实数
,使得
?若存在,求出
的值:若不存在,请说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c278812c4813f6391c7993574e2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59ab6bf6111dda4a3d428454768b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0d53573554894dbe3b31027d7cdfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e513fd59e59bda50100de1b4571a235.png)
![](https://img.xkw.com/dksih/QBM/2022/3/11/2934043967733760/2938047420350464/STEM/eb78ca6b-0562-41ff-a8ab-44726c74118d.png?resizew=204)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c174f127b7234ebb6a87d9185bd2210.png)
(2)是否存在非零实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c47c25136e592e22c28008ea5b74e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2022-03-17更新
|
703次组卷
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7卷引用:甘肃省天水市第一中学2022-2023学年高一下学期3月月考数学试题