名校
1 . 对于给定的正整数n,记集合
,其中元素
称为一个n维向量.特别地,
称为零向量.设
,
,
,定义加法和数乘:
,
.对一组向量
,
,…,
,若存在一组不全为零的实数
,
,…,
,使得
,则称这组向量线性相关.否则,称为线性无关.
(1)对
,判断下列各组向量是线性相关还是线性无关,并说明理由.
①
,
;
②
,
,
.
(2)已知
,
,
线性无关,判断
,
,
是线性相关还是线性无关,并说明理由.
(3)已知
个向量
,
,…,
线性相关,但其中任意
个都线性无关,证明:
①如果存在等式
(
,
,2,3,…,m),则这些系数
,
,…,
或者全为零,或者全不为零;
②如果两个等式
,
(
,
,
,2,3,…,m)同时成立,其中
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c268e3b7bce8f372d990464c87444b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2780422eefb9e85b89074a1ba2a159d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe49f7818e5ad16acee2d6465bd32167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45895410f2b24085e0b2c0ef4e3972d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199d8b6bed52403a6f5f5427a9fd4d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c94465dc3bf780fc91c040d1a3bb8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e138e8b9bb05f0ea5b9fad817c465d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21ce8a9960521a88f436e422517acb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a40932863dcc8cb8356bbd487eaf196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43fd777be9b2e4fdfe3fbe9a7cdde79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4c00a7ff8e54eee5d229103909102a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2dc187e5bae6ab191f2442948763ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecd09e653f57627caa3093b66e6b75c.png)
(1)对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55be88844fc52fee28e0bd37a81a77d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a34022ff1222ec7909d44b690b2bc4e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55be88844fc52fee28e0bd37a81a77d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a34022ff1222ec7909d44b690b2bc4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b6a62632a7b6a6cfbf8048bb87f73e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2780422eefb9e85b89074a1ba2a159d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433a8c622b44e1aa29e9989e6978dd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce37584c2347198ce2aa9a662ae5e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcb29b663cf1fb1ff2b3c9d1a7aebf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f55a2d5150f65f9827dd0d60a7472d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5540f4fca1858710a56dbcd89c987f.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b7acc609f1148cfa29b8b05c638ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a40932863dcc8cb8356bbd487eaf196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43fd777be9b2e4fdfe3fbe9a7cdde79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0c36e75691a88bd6e38e6269e69fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1e94f660b7d05de4be4b5fbd9041f4.png)
①如果存在等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae8a8ca9b95636ba10a90ad24fa041e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ceb44b2b2d9e16bee41f43e88c2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27628b047da341c79074ea4aa938ddc8.png)
②如果两个等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae8a8ca9b95636ba10a90ad24fa041e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b55fdee5ba9c4308c4b66f691c868f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ceb44b2b2d9e16bee41f43e88c2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb35f7f9c781125fa15af1a0bafd440f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7e640eee0dfb154aa815091d1c7ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd9175a6d8d1d75238a4b60db254846.png)
您最近一年使用:0次
名校
解题方法
2 . 把符号称为二阶行列式,规定它的运算法则为
.已知函数
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388d3d213a231cccf854a29eef611d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5224a7da7fe6bc28971ce4c277f88588.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f504fcfe5b1116cdcdfa37fccae8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24eb36914c5d05da7d3e23900f0b4124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e2227004f51fac55c38578e2843acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e37ee5f5ea8640aae6193de160c9ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2023-09-21更新
|
920次组卷
|
4卷引用:湖南省邵阳市邵东市第三中学2024届高三实验班上学期第二次月考数学试题
名校
解题方法
3 . 如图,已知
是边长为1的正
的外心,
为
边上的
等分点,
为
边上的
等分点,
为
边上的
等分点.
时,求
的值;
(2)当
时.
①求
的值(用含
,
的式子表示);
②若
,分别求集合
中最大元素与最小元素的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db4fe79b98486f0d4556f37d64d74f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6faaeb653a3fc73570c131dc8a81c38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba2ed83f255ca4c4037358d06c2fc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ea0392d4bd0374c8a2b12a355e4655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18627eab55012586f5894d21a11f17f5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0caf7b43a7461be3e697613fe2ca2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caababdb90e1cac74532c256c4c42139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2023-07-04更新
|
925次组卷
|
6卷引用:湖南省常德市津市市第一中学2023-2024学年高一下学期4月月考数学试题
湖南省常德市津市市第一中学2023-2024学年高一下学期4月月考数学试题上海市上海中学2022-2023学年高一下学期期末数学试题(已下线)8.2 向量的数量积-同步精品课堂(沪教版2020必修第二册)(已下线)专题06 期末解答压轴题-《期末真题分类汇编》(上海专用)(已下线)上海市高一下学期期末真题必刷04-期末考点大串讲(沪教版2020必修二)(已下线)考题猜想03 平面向量-期末考点大串讲(沪教版2020必修二)
名校
解题方法
4 . 在
中,
,且
边上的中线长为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
(1)求角
的大小;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9af36b9bc8c14c2c2ae9d65f92d8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700762875cb4f15b556a72f10a42ac9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2019-07-15更新
|
6886次组卷
|
5卷引用:2020届湖南省长沙市长郡中学高三月考(三)数学理科试题
2020届湖南省长沙市长郡中学高三月考(三)数学理科试题江苏省扬州市宝应县安宜高级中学2022-2023学年高三上学期第三次阶段考试数学试题河北省邯郸市2018-2019学年高一下学期期末考试数学试题(已下线)卷08-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》(已下线)重组卷03-冲刺2021年高考数学之精选真题+模拟重组卷(新高考地区专用)