解题方法
1 . 已知正实数
,称
为
的算术平均数,
为
的几何平均数,
为
的希罗平均数.
为
的
边上异于
的动点,点
满足
且
,则正数
的希罗平均数
的最大值是______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24b1e1f5c0829579ea1992423cefdb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22aa12a557fb78e04a98ae503f00660d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002a9d504f4099a376b4ed4e5042be61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbe99b814086689438430e7ee782558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b672d9a601522584c2f5e19dd88ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
您最近一年使用:0次
2023-03-16更新
|
945次组卷
|
6卷引用:第84练 计算速度训练4
(已下线)第84练 计算速度训练4(已下线)模块6 平面几何篇 第1讲:向量合成定理与三角形四心【练】(已下线)6.3.1 平面向量基本定理【第三练】“上好三节课,做好三套题“高中数学素养晋级之路四川省凉山州2023届高三下学期二诊理科数学试题江西省南昌市江西科技学院附属中学2022-2023学年高一下学期期中考试数学试题2024届高三高考综合模拟测试数学试题(二)
名校
2 . 声音是由物体的振动产生的能引起听觉的波,每一个音都是由纯音合成的,纯音的数学模型是函数
.某技术人员获取了某种声波,其数学模型记为
,部分图象如图所示,对该声波进行逆向分析,发现它是由两种不同的纯音合成的,满足
,其中
,则
= _________ .(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71c55c252c3a7226a0b2bc2982ced94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0f95409ab8d4d5aef0d4a6ef861e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d68a5cda904f8a83ec99172138aa8f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37c07cdc81fa515e5eb75dad138684c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/56a425bb-8d3f-4abb-bda7-6a69955e7ab3.png?resizew=303)
您最近一年使用:0次
2023-02-25更新
|
578次组卷
|
3卷引用:第五章 三角函数(32类知识归纳+38类题型突破)(7) - 速记·巧练(人教A版2019必修第一册)
(已下线)第五章 三角函数(32类知识归纳+38类题型突破)(7) - 速记·巧练(人教A版2019必修第一册)上海师范大学附属中学2022-2023学年高一下学期期中数学试题福建省厦门市2022-2023学年高一上学期学业水平测试数学试题
3 . 赵爽是我国汉代数学家,他在注解《周髀算经》时给出的“赵爽弦图”被选为第24届国际数学家大会的会徽.如图所示,“赵爽弦”图中的大正方形
是由4个全等的直角三角形和小正方形
拼成,现连接
,当正方形
的边长为1且其面积与正方形
的面积之比为1∶5时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa118d86e0420a3345b44f264c8aedd.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa118d86e0420a3345b44f264c8aedd.png)
您最近一年使用:0次
2023-02-19更新
|
962次组卷
|
6卷引用:专题06三角函数与解三角形(选择填空题)
(已下线)专题06三角函数与解三角形(选择填空题)(已下线)专题19新文化试题(已下线)【练】专题8 三角函数中的新定义、数学文化问题贵阳省铜仁市2023届高三下学期适应性考试(一)数学(理)试题贵州省贵阳市2023届高三下学期适应性考试(一)数学(文)试题贵州省贵阳市2023届高三下学期适应性考试(一)数学(理)试题
4 . 某市以市民需求为导向,对某公园进行升级改造,以提升市民的游园体验.已知公园的形状为如图所示的扇形
区域,其半径为2千米,圆心角为
,道路的一个顶点C在弧
上.现在规划三条商业街道
,要求街道
与
平行,交
于点D,街道
与
垂直(垂足E在
上),则街道
长度最大值为___________ 千米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7cd3c10cf231c42eb427fab982d1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/5e9d9b83-e396-4412-9544-7e5e3b760d51.png?resizew=132)
您最近一年使用:0次
解题方法
5 . 已知圆
的直径
上有两点
、
,且有
,
为圆
的一条弦,则
的范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/62a216c66ef6ddf2cde78a7657279e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630dc8631c3f0107d26f9dfa3c100992.png)
您最近一年使用:0次
6 . 弧度制是当今数学主要的角的单位制,它使进位制统一.在古巴比伦以及古希腊时期,数学家在研究天文学问题时,普遍习惯使用60进制对角进行度量,为了进位制的统一,也用60进制度量弦长和弧长.此时,角度制满足了这种需求,而随着历史的发展,10进制取代了60进制成了度量长度的主要进位制.为了保持进位制的统一,自然也将角的进位制换成10进制.弧度制满足了这一需求,而且可以与角度制进行一一位制表示的数,便于数与数之间的对比,提高解决问题的效率.比如:化弧度制
为角度制是______ ,化角度制-240°为弧度制是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a588de02d8a8e43ac3cca2a19e41b2d.png)
您最近一年使用:0次
名校
解题方法
7 . 在
中,
,在
所在平面内的一点
满足
,当
时,
的值为______
取得最小值时,
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69550d878381f6e8fb436e88638f070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e09d781654672fc40658b89830b7641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f263f0dd26b5fd6f64c6f5b43f9be9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0ab9afeba3ffd4939a81f90d00f069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2023-01-05更新
|
621次组卷
|
3卷引用:第07讲 6.3.2-6.3.4平面向量数乘运算的坐标表示(1)-【帮课堂】(人教A版2019必修第二册)
(已下线)第07讲 6.3.2-6.3.4平面向量数乘运算的坐标表示(1)-【帮课堂】(人教A版2019必修第二册)天津市第一中学2022-2023学年高三上学期第三次月考数学试题天津市第四十二中学2022-2023学年高三下学期第二次月考数学试题
8 . 如图,
、
、
的坐标分别为______ 、______ 、______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
您最近一年使用:0次
2023-01-05更新
|
702次组卷
|
10卷引用:6.3.2平面向量的正交分解及坐标表示(课件+作业)
(已下线)6.3.2平面向量的正交分解及坐标表示(课件+作业)(已下线)6.3.2平面向量的正交分解及坐标表示-高频考点通关与解题策略(人教A版2019必修第二册)人教A版(2019) 必修第二册 突围者 第六章 第三节 课时2平面向量的正交分解及坐标表示山西省太原市第五十六中学2020-2021学年高一下学期第一次月考数学试题第7课时 课前 面向量的正交分解与坐标表示、平面向量加、减的坐标表示人教A版(2019) 必修第二册 实战演练 第六章 课时练习08平面向量的正交分解及坐标表示平面向量加、减运算的坐标表示沪教版(2020) 必修第二册 同步跟踪练习 第8章 8.3.2 向量的正交分解与坐标表示6.3.2平面向量的正交分解及坐标表示练习(已下线)专题03 平面向量基本定理及坐标表示(六大考点)-【寒假自学课】(人教A版2019)(已下线)6.3.2 平面向量的正交分解及坐标表示——课堂例题
9 . 下列各量中,向量有:______ .(填写序号)
①浓度;②年龄;③风力;④面积;⑤位移;⑥人造卫星的速度;⑦电量;⑧向心力;⑨盈利;⑩加速度.
①浓度;②年龄;③风力;④面积;⑤位移;⑥人造卫星的速度;⑦电量;⑧向心力;⑨盈利;⑩加速度.
您最近一年使用:0次
2023-01-04更新
|
1357次组卷
|
8卷引用:第六章平面向量及其应用(知识通关)(1)
(已下线)第六章平面向量及其应用(知识通关)(1)沪教版(2020) 必修第二册 单元训练 第8章 向量的概念和线性运算 (A卷)(已下线)9.1 向量的概念(已下线)第9章:平面向量 重点题型复习-【题型分类归纳】2022-2023学年高一数学同步讲与练(苏教版2019必修第二册)(已下线)第8章 平面向量(A卷·知识通关练)-【单元测试】2022-2023学年高一数学分层训练AB卷(沪教版2020必修第二册)(已下线)专题6.14 平面向量及其应用全章综合测试卷(基础篇)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)6.1.1向量的实际背景与概念练习(已下线)6.1 平面向量的概念——课后作业(基础版)
10 . 向量的数量积
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/40ee25a3-7b2a-4555-9ede-deee420bc0b9.png?resizew=158)
(1)向量数量积的定义
①向量的夹角:已知两个非零向量
,
,O是平面上的任意一点,作
=
,
=
(如图所示),则∠AOB=θ(0≤θ≤π)叫做向量
与
的夹角.
②向量的平行与垂直:当θ=0时,
与
同向;当θ=π时,
与
反向;如果
与
的夹角是
,我们说
与
垂直,记作
⊥
.
③向量的数量积:已知两个非零向量
与
,它们的夹角为θ,我们把数量|
||
|cosθ叫做向量
与
的数量积(或内积),记作
·
,即
·
=|
||
|cosθ.
规定:零向量与任一向量的数量积为0.
(2)向量的投影
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/7d24cdee-e446-434b-9a38-a362bc57a47f.png?resizew=165)
①定义:如图,设
,
是两个非零向量,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6eab0544c9fad5acde25bec349fb02.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9d86315677a86bb4dc09d06310f3f1.png)
,作如下的变换:过
的起点
和终点
,分别作
所在直线的垂线,垂足分别为
,
,得到
,则称上述变换为向量
向向量
投影,
叫做向量
在向量
上的投影向量.
②计算:设与
方向相同的单位向量为
,
与
的夹角为θ,则向量
在向量
上的投影向量是|
|cosθ
.
(3)向量数量积的性质
设
,
是非零向量,它们的夹角是θ,
是与
方向相同的单位向量,则
①
·
=
·
=|
|cosθ.
②
⊥
⇔
·
=0.
③当
与
同向时,
·
=|
||
|;当
与
反向时,
·
=-|
||
|.特别地,
·
=|
|2或|
|=
.
④|
·
|≤|
||
|.
(4)向量数量积运算的运算律对于向量
,
,
和实数λ,有
①
·
=
·
;
②(λ
)·
=λ(
·
)=
·(λ
);
③(
+
)·
=
·
+
·
.
(5)数量积的坐标表示
设
=(x1,y1),
=(x2,y2),则
①
·
=x1x2+y1y2;
2=
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba7843f0a56f5e731c14a4f1edde55f.png)
____________ .
②
⊥
⇔____________ .
③
④设θ是
与
的夹角,则cosθ=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421d881ac25b59201f971aafba71ffb8.png)
____________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/40ee25a3-7b2a-4555-9ede-deee420bc0b9.png?resizew=158)
(1)向量数量积的定义
①向量的夹角:已知两个非零向量
![](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/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②向量的平行与垂直:当θ=0时,
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/b1ad72d7565699d1ebb741eb0ce12bac.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
③向量的数量积:已知两个非零向量
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
规定:零向量与任一向量的数量积为0.
(2)向量的投影
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/7d24cdee-e446-434b-9a38-a362bc57a47f.png?resizew=165)
①定义:如图,设
![](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/bf6eab0544c9fad5acde25bec349fb02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9d86315677a86bb4dc09d06310f3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.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/bc1070a28cb9cb8553c29747d1993b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b764e1eb495a092699a2008a031335.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/65b764e1eb495a092699a2008a031335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②计算:设与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(3)向量数量积的性质
设
![](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/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
③当
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4545c2c12384f72614ad95b486a2ace.png)
④|
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(4)向量数量积运算的运算律对于向量
![](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)
①
![](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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②(λ
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
③(
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(5)数量积的坐标表示
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
①
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fd4492bf478b5027e578641fbe74170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba7843f0a56f5e731c14a4f1edde55f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fc8f299a6555155891a48d89963fbe.png)
④设θ是
![](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/421d881ac25b59201f971aafba71ffb8.png)
您最近一年使用:0次