名校
1 . 在
中,
,
为
的中点,则
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebb59b04fc8b61bc9ac4c22bd210c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a2231e8ecbc2978ae36f81e581b4eea.png)
A.2 | B.-2 | C.![]() | D.![]() |
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2018-04-24更新
|
1150次组卷
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3卷引用:2020届宁夏石嘴山市第三中学高三上学期期末数学(理)试题
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2 . 平行四边形
中,
,
,
,点
在边
上,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe8c1a4d23e26b841b0b2f1a8049190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3a8a0dfd7605db35891143f4bfc02f.png)
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2019-03-30更新
|
572次组卷
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2卷引用:【全国百强校】宁夏回族自治区银川一中2018-2019学年高一下学期期中考试数学试题
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解题方法
3 . 在
中,已知
,
,
,点
是边
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a355958abf7dc0f2eb949584cb87907b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2964fea2c107bbfd4a07fc97f4de5988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4b6c682d7b0741fb1f12a073394fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd50d0b2a5f776d7171411edbb0427cd.png)
A.2 | B.![]() | C.![]() | D.![]() |
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2020-03-05更新
|
370次组卷
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3卷引用:2020届宁夏银川二中上学期高三年级统练三数学(文)试题
2020届宁夏银川二中上学期高三年级统练三数学(文)试题宁夏回族自治区石嘴山市平罗县平罗中学2022-2023学年高二上学期期中理科数学试题(已下线)福建省厦门市松柏中学2021-2022学年高二上学期开学考试数学试题
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4 . 若等边△ABC的边长为
,平面内一点M满足:
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1d72c44833286a205ac9f1c6f6872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca4ab15a1934f0bbcbe4780eb5a48ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1d72c44833286a205ac9f1c6f6872b.png)
A.-2 | B.1 | C.2 | D.-1 |
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5 . 下列说法正确的个数为( )
①命题“
中,若
,则
”的逆命题是真命题
②若命题
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb891c47254f60880fc3542d1949c3f.png)
③“命题
为真命题”是“命题
为假命题”的充要条件
④设
均为非零向量,则“
”是“
与
的夹角为锐角”的必要不充分条件
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b4908b37cf23de34d38ae7a0bff278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378ccfe83d84e3f384e92ebdcce11a7b.png)
②若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be4bf7757a5ff14eee68e7091ce410f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb891c47254f60880fc3542d1949c3f.png)
③“命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575feaa04c7836a3743306b6378f9cd6.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90eb96b770a4bed15037b68a77eb9667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.1 | B.2 | C.3 | D.4 |
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2020-06-11更新
|
321次组卷
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2卷引用:2024届宁夏回族自治区银川一中高考三模理科数学试题
解题方法
6 . 在边长为2的菱形ABCD中,
,E是BC的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f77f0f76455ffe14e81e7ce79bc019.png)
A.![]() | B.![]() | C.![]() | D.9 |
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2020-05-12更新
|
242次组卷
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2卷引用:2020届宁夏石嘴山市高三4月二模数学(理)试题
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7 .
的内角
、
、
的对边分别为
、
、
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1142176aeceb3e9327d15063ce3fa6de.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8c65bea2c80af038768b74250c694e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca58907258f11b1cc45539c817604a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1142176aeceb3e9327d15063ce3fa6de.png)
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10-11高一下·吉林长春·期中
8 . 在三角形
中,角
的对边分别是
,且
,
(1)求
;
(2)若
,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead4af7dd446bd75d611bcc95dd0729b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a3e843887b1456835107709a0d6183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f448ab705ce98a0b1ab97863d0cbeda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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2016-12-10更新
|
1183次组卷
|
5卷引用:宁夏中卫市海原县第一中学2019-2020学年高二上学期期末数学(理)试题
宁夏中卫市海原县第一中学2019-2020学年高二上学期期末数学(理)试题(已下线)2010-2011年吉林省长春市十一中高一第二学期期中考试理科数学(已下线)2013-2014学年河南省武陟一中西区高二第三次月考文科数学试卷辽宁省本溪市燕东高中2019-2020学年高一下学期线上段考新教材数学试题2007年普通高等学校招生考试数学(文)试题(山东卷)
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解题方法
9 . 在
中,角
的对边分别为
且
与
的等差中项为
.
(1)求
的值;
(2)若
的面积是
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437672312c12818082d6c8b7f8080f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85371e928555a0a87bb6e960ab359813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6921d798509f5d0604bc7d38d5bec74.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01961669cd597f61fa48e9853d678bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac9985a4a64d815e9d5bca84a9de330.png)
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名校
10 . 若
,
,
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd18461fd9d77e6fa46a654f0ab540f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082c6926889f84f438ea35f70bf05f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380ba004eefee58519a21ef1b3370a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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