当前位置:首页>文档>(1.2.4)-第三章向量_08.2026考研数学高途王喆全程班_赠送2025课程_25考研数学(一、二)全年智达班_{2}--资料_{1}-基础精讲简版答案和视频索引_{2}-线代

(1.2.4)-第三章向量_08.2026考研数学高途王喆全程班_赠送2025课程_25考研数学(一、二)全年智达班_{2}--资料_{1}-基础精讲简版答案和视频索引_{2}-线代

  • 2026-03-01 17:02:10 2026-02-28 15:59:10

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(1.2.4)-第三章向量_08.2026考研数学高途王喆全程班_赠送2025课程_25考研数学(一、二)全年智达班_{2}--资料_{1}-基础精讲简版答案和视频索引_{2}-线代
(1.2.4)-第三章向量_08.2026考研数学高途王喆全程班_赠送2025课程_25考研数学(一、二)全年智达班_{2}--资料_{1}-基础精讲简版答案和视频索引_{2}-线代
(1.2.4)-第三章向量_08.2026考研数学高途王喆全程班_赠送2025课程_25考研数学(一、二)全年智达班_{2}--资料_{1}-基础精讲简版答案和视频索引_{2}-线代

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第三章 向量 第1 节 向量及其运算 【本节无例题】 详细讲解—见线代15 向量及其运算 第2 节 向量的线性相关与线性表示 例3.2.1 ,,无关| |0t 5; 答案: 1 2 3 1 2 3 ,,相关| |=0t=5 1 2 3 1 2 3 详细讲解—见线代16 向量的线性相关与线性无关 00:21:29 例3.2.2 答案: 证 明 略 详细讲解—见线代16 向量的线性相关与线性无关 00:26:20 例3.2.3 答案: − 1 详细讲解—见线代16 向量的线性相关与线性无关 00:53:10 例3.2.4 答案: C 详细讲解—见线代16 向量的线性相关与线性无关 00:55:23 第 3 节 向量的线性表示法与向量组的等价 1 例3.3.1 答案: 1 , 2 , 3     可 由 线 性 表 示 详细讲解—见线代17 向量的线性表示法与向量组的等价1 00:15:59 例3.3.2 答案: r ( 1 2 3 r ) ( r r 1 ( ( 2 1 1 3 2 2 ) 3 3 ) r ( ) r 1 ( 2 1 a 3 2 0 3 ) a ) 3 b 3 ; a a 0 b a a b ; 0 ;             ( ( ( 1 2 3 ) ) ) 可 不 可 由 能 由 向 由 向 量 向 量 组 量 组 A 组 A 线 A 线 性 线 性 表 性 表 出 表 出 且 出 且 表  表 法 法 唯 不 一 唯  一   = | =  = | 且 | =      = 且 且   详细讲解—见线代17 向量的线性表示法与向量组的等价1 00:21:02 第 4 节 向量的线性表示法与向量组的等价 2例3.4.3 答案: a = 1 详细讲解—见线代18 向量的线性表示法与向量组的等价2 00:19:42 例3.4.4 答案: 证 明 略 详细讲解—见线代18 向量的线性表示法与向量组的等价2 00:37:02 例3.4.5 答案:B 详细讲解—见线代18 向量的线性表示法与向量组的等价2 00:39:57 第5 节 向量的秩与最大线性无关组 1 例3.5.1 答案:C 详细讲解—见线代19 向量组的秩与极大线性无关组1 00:20:04 例3.5.2 答案: D 详细讲解—见线代19 向量组的秩与极大线性无关组1 00:25:19 第6 节 向量的秩与最大线性无关组 2 例3.6.3 答案: c c = r r ( ( 1 1 2 2 3 3 4 4 ) ) 3 4 1 1 , , 2 2 , , 3 3 , 4 T T          ( ( 1 2 ) ) 当 当  2 2 时 时 , , = = , , 即 为 即 为 的 一 的 个 一 最 个 大 最 无 大 关 无 组 关 ; 组 。 详细讲解—见线代20 向量组的秩与极大线性无关组2 00:32:37 例3.6.4 (1)r(A)=2=r(),,即为 A 的一个最大无关组; 1 2 3 4 1 2 答案: 1 5 (2) =− − ; =2 − 3 2 1 2 2 4 1 2 详细讲解—见线代20 向量组的秩与极大线性无关组2 00:37:55 第7 节 向量空间的基与维数(仅数一)例3.7.1 9 答案:t =− 4 详细讲解—见线代21 向量空间(仅数一) 00:11:52 例3.7.2 答案:  x x x 1 2 3  =  1 − 1 / 1 2 / 2  详细讲解—见线代21 向量空间(仅数一) 00:18:32 例3.7.3 答案: (1 ( 2 ) ) 1 0 0 8 2 1 1 4 0 0 0 2 1 2 2 5 4 1 0 4 1 3 3 2 1 1 0 4      C = =  − − − + − + − − −  详细讲解—见线代21 向量空间(仅数一) 00:34:38
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  1. CONNECT:[ UseTime:0.000941s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001626s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000785s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000705s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.002179s ]
  6. SELECT * FROM `set` [ RunTime:0.000692s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.002287s ]
  8. SELECT * FROM `wendang` WHERE `id` = 328719 LIMIT 1 [ RunTime:0.002269s ]
  9. UPDATE `wendang` SET `liulancishu` = 6 WHERE `id` = 328719 [ RunTime:0.004903s ]
  10. UPDATE `wendang` SET `lasttime` = 1772382166 WHERE `id` = 328719 [ RunTime:0.001456s ]
  11. SELECT * FROM `wendang` WHERE `id` < 328719 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001161s ]
  12. SELECT * FROM `wendang` WHERE `id` > 328719 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002911s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 328719 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003170s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 328719 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.011476s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 328719 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.010341s ]
0.139367s