1 . 已知向量
的夹角为
,且
,
,设
,
.
(1)试用t来表示
的值;
(2)若
与
的夹角为钝角,试求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](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/e823fa8d47666d2a61f3eaf7587131e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3b75ddeff746c22973e8b84fb6ff2.png)
(1)试用t来表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741574f71252839af5c088cf224bf159.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
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名校
2 . 已知梯形
,
,设
,向量
的起点和终点分别是
、
、
、
中的两个点,若对平面中任意的非零向量
,都可以唯一表示为
、
的线性组合,那么
的个数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fef26d37e6c983516e2c6b0a27b21f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
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2019-10-23更新
|
206次组卷
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2卷引用:上海市青浦区2019-2020学年高二上学期期中数学试题
名校
3 . 设
轴、
轴正方向上的单位向量分别是
,坐标平面上点列
分别满足下列两个条件:①
且
;②
且
;
(1)写出
及
的坐标,并求出
的坐标
(2)若
的面积是
,求
的表达式
(3)对于(2)中的
,是否存在最大的自然数
,对一切
都有
成立?若存在,求出
,若不存在,说明理由
![](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/eb4868d6790066750d6fc1b361b41bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce3fda051e46ce70ac23b01fc4cb46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d37882749aa24648a00cbf1b6ac504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af38ef62c4376afd666ab730476c4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79dcb1c9ae679a2c9d39cbe3aef4026e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aadc8ee4626512c25e8d9b2dcc58e47.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7179a1cec8c930d7c6afcaee2c4d908f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badbf0073031a679eb0caa32f42600ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22034385f3c155410cc757c7f2618fc3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641b2a6072bde5a30c6a4ff8684450f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbf4456c438046e0fe758af74a0ed24.png)
(3)对于(2)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b186ba8c8546dcc3d2b594b85752f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2020-02-29更新
|
476次组卷
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4卷引用:上海市青浦高中2020-2021学年高二上学期10月月考数学试题
4 . 已知等边三角形
中,点
为线段
上一点,且
.
(1)若等边三角形边长为6,且
,求
;
(2)若
,求
的值
(3)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0a4b74ebe0c939105ceb9467727094.png)
(1)若等边三角形边长为6,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78105367e5fda221e68ffc7463fa31b7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eeda5c5b6777efb480ce665b84b9ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ded12d358a558af0671ea742f42d182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2020-03-07更新
|
700次组卷
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2卷引用:上海市青浦一中2016-2017学年高二上学期期中数学试题
名校
5 . 在
中,角
所对的边分别为
且
的平分线为
,若
.
(1)当
时,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)当
时,求实数
的取值范围.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e22f29fc297a26921ade31885f02e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca5069d7e40b2cae0a958848db7691c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490dbad26c5c3795270cd1a3b8468e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-03-07更新
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412次组卷
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6卷引用:上海市青浦一中2016-2017学年高二上学期期中数学试题
2012高三上·上海·学业考试
名校
解题方法
6 . 设
是平面内互不平行的三个向量,
,有下列命题:①方程
不可能有两个不同的实数解;②方程
有实数解的充要条件是
;③方程
有唯一的实数解
;④方程
没有实数解,其中真命题有_______________ .(写出所有真命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932125d9f832d194b63778c08887e398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa13e050ea274556729e82588815c1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa13e050ea274556729e82588815c1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2c4991f24f272096d538901ab64a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6573d03e5df7f70f268e380f84ad66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eff7e596204e353c428d0c5ba114bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6573d03e5df7f70f268e380f84ad66.png)
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2020-02-09更新
|
160次组卷
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7卷引用:上海市青浦高中2020-2021学年高二上学期10月月考数学试题
上海市青浦高中2020-2021学年高二上学期10月月考数学试题上海市市北中学2018-2019学年高二上学期期中数学试题(已下线)上海市位育中学2014-2015学年高二上学期期中数学试题(已下线)2012届上海市十三校高三上学期第一次联考试题文科数学上海市实验学校2018届高三上学期第四次月考数学试题(已下线)第12讲 向量的坐标表示(讲义)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)(已下线)8.2 向量的数量积(作业)-【上好课】2020-2021学年高一数学下册同步备课系列(沪教版2020必修第二册)
7 . 对于菱形
,给出下列各式:
①
;②
;③
;④
.
其中正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db623cc701af0181285b72d8c100b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd23ee48f2af36573e014a806d04560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2ece68d117dd4cd42ca95aa9e8e4d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5135d50717594d71c44b3ffb2a0efd.png)
其中正确的个数为( )
A.1个 | B.2个 | C.3个 | D.4个 |
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2017-01-10更新
|
1084次组卷
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3卷引用:上海市青浦高级中学2016-2017学年高二上学期期中数学试题
14-15高三上·辽宁·阶段练习
名校
8 . 已知点
是三角形
的外接圆圆心,且
.若存在非零实数
,使得
,且
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0f3d63fbecff1cbeaa844ee35dee6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb9914fb59e51bf918fe296650bdce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131ac7eb1e911c9a40e84235bf3742ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27dc396251a4453094d19baa79816.png)
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2016-12-03更新
|
452次组卷
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4卷引用:上海市青浦高中2020-2021学年高二上学期10月月考数学试题
上海市青浦高中2020-2021学年高二上学期10月月考数学试题(已下线)2015届辽宁师范大学附属中学高三10月月考理科数学试卷皖江名校2018届高三12月份大联考数学(理)试题安徽省宣城市郎溪中学、泾县中学2020-2021学年高一下学期3月联考数学试题
2014·北京房山·一模
名校
9 . 如图,在梯形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
,
,
,点
是
边上一动点,则
的最大值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a08b4e03e68c32133a98fc40ed5cf52a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5087cd56f622c1f9541e1a7deaad24.png)
![](https://img.xkw.com/dksih/QBM/2014/5/12/1571712601071616/1571712606732288/STEM/541df0735393493591cb121d32beac54.png?resizew=243)
您最近一年使用:0次
2016-12-03更新
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2084次组卷
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9卷引用:上海市青浦高中2020-2021学年高二上学期10月月考数学试题
上海市青浦高中2020-2021学年高二上学期10月月考数学试题上海市嘉定二中2019-2020学年高二上学期10月月考数学试题上海市莘庄中学等四校2015-2016学年高二上学期11月联考数学试题(已下线)2014届北京市房山区4月高三一模理科数学试卷甘肃省白银市第十中学2018-2019学年高一上学期期中数学试题(已下线)第12讲 向量的坐标表示(讲义)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)沪教版(2020) 必修第二册 同步跟踪练习 第8章 平面向量 单元测试卷沪教版(2020) 必修第二册 同步跟踪练习 第8章 测试卷陕西省西安市大联考2022-2023学年高一下学期期中数学试题
2014·上海虹口·二模
名校
10 . 如图,
是直角边等于4的等腰直角三角形,
是斜边
的中点,
,向量
的终点
在
的内部(不含边界),则实数
的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7000c43232d7ca16e4bf46810ef4b4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888afd002858f23a84a8755a002bed7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2014/4/28/1571689492922368/1571689498681344/STEM/7d46ad27-6678-4423-8c34-13efd6074ccf.png?resizew=161)
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2016-12-02更新
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5358次组卷
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4卷引用:上海市青浦一中2016-2017学年高二上学期期中数学试题
上海市青浦一中2016-2017学年高二上学期期中数学试题内蒙古阿拉善盟第一中学2020-2021学年高二上学期第二次段考理科数学试题(已下线)2014届上海市虹口区高三4月高考练习(二模)文科数学试卷2015-2016学年安徽省六安一中高一下期中数学试卷