当前位置:首页>文档>(39)-基础加强小灶课课件线代1、线代2笔记版_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

(39)-基础加强小灶课课件线代1、线代2笔记版_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

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(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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
(39)-基础加强小灶课课件线代1、线代2笔记版_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

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𝟏.设𝜶 ,𝜶 ,𝜷 ,𝜷 为3维向量,𝑨 = (𝜶 ,𝜶 ,𝜷 ),𝑩 = (𝜶 ,𝜶 ,𝜷 ),且|𝑨| = 3,|𝑩| = 2,求 (cid:2869) (cid:2870) (cid:2869) (cid:2870) (cid:2869) (cid:2870) (cid:2869) (cid:2869) (cid:2870) (cid:2870) |𝟐𝑨+𝟑𝑩|.𝟐.设𝑨为𝑛阶矩阵,且满足𝑨𝑨(cid:2904) = 𝑬,若|𝑨| = −1,则|𝑨+𝑬| = .𝟑.设𝑨,𝑩为3阶矩阵,且|𝑨| = 3,|𝑩| = 2,(cid:3627)𝑨(cid:2879)𝟏 +𝑩(cid:3627) = 2,求(cid:3627)𝑨+𝑩(cid:2879)𝟏(cid:3627).𝟒.设3 阶矩阵𝑨的特征值为−1,2,3,则|𝑨+𝑨∗| = .0 1 0 0 1 ⎛0 0 0⎞ 2 ⎜ ⎟ 𝟓.已知矩阵𝑨 = 1 ,则|𝑨|中的所有代数余子式之和为 . ⎜ ⎟ 0 0 0 ⎜ 3⎟ 1 0 0 0 ⎝4 ⎠−1 2 1 𝟔.设矩阵𝑨 = (cid:3438) 3 −6 −3(cid:3442),则𝑨𝒏 = . 2 −4 −25 2 0 0 ⎛2 1 0 0 ⎞ 𝟕.设4阶方阵𝑨 = ,则𝑨的逆矩阵𝑨(cid:2879)(cid:2869) = . ⎜ ⎟ 0 0 1 −2 ⎝0 0 1 −1⎠𝟖.设𝑨为𝑛阶可逆矩阵,𝜶为𝑛维列向量,𝑏为常数,记分块矩阵 𝑬 𝟎 𝑨 𝜶 𝑷 = (cid:3436) (cid:3440),𝑸 = (cid:4672) (cid:4673),其中𝑨∗为𝑨的伴随矩阵,𝑬为𝑛阶单位矩阵. −𝜶(cid:2904)𝑨∗ |𝑨| 𝜶(cid:2904) 𝑏 (1)计算并化简𝑷𝑸;(2)证明:矩阵𝑸可逆的充分必要条件是𝜶(cid:2904)𝑨(cid:2879)(cid:2869) 𝜶 ≠ 𝑏.𝟗.设𝑨为𝑛阶可逆矩阵,交换𝑨的第1行与第2行得到矩阵𝑩,𝑨∗,𝑩∗分别为𝑨,𝑩的伴随矩阵,则 ( ) (A)交换𝑨∗的第 1列与第2 列得到𝑩∗. (B)交换𝑨∗的第1 行与第2 行得到𝑩∗. (C)交换𝑨∗的第1 列与第2列得到−𝑩∗. (D)交换𝑨∗的第1 行与第2 行得到−𝑩∗.1 0 0 𝟏𝟎.设𝑨为3阶矩阵,𝑷为3阶可逆矩阵,且𝑷(cid:2879)(cid:2869)𝑨𝑷 = (cid:3438)0 1 0(cid:3442). 0 0 2 若𝑷 = (𝜶 ,𝜶 ,𝜶 ),𝑸 = (𝜶 +𝜶 ,𝜶 ,𝜶 ),则𝑸(cid:2879)(cid:2869)𝑨𝑸 = ( ) (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2870) (cid:2871) 1 0 0 1 0 0 2 0 0 2 0 0 (A)(cid:3438)0 2 0(cid:3442). (B)(cid:3438)0 1 0(cid:3442). (C)(cid:3438)0 1 0(cid:3442). (D)(cid:3438)0 2 0(cid:3442). 0 0 1 0 0 2 0 0 2 0 0 1𝟏𝟏.已知3维列向量组𝜶 ,𝜶 ,𝜶 线性无关,若𝜶 −𝜶 ,𝜶 −𝑘𝜶 ,𝜶 −𝜶 也线性无关的充要条 (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2870) (cid:2871) (cid:2871) (cid:2869) 件为 .𝟏𝟐.设𝑨,𝑩为满足𝑨𝑩 = 𝑶的任意两个非零矩阵,则必有( ) (A) 𝑨的列向量组线性相关,𝑩的行向量组线性相关. (B) 𝑨的列向量组线性相关,𝑩的列向量组线性相关. (C) 𝑨的行向量组线性相关,𝑩的行向量组线性相关. (D) 𝑨的行向量组线性相关,𝑩的列向量组线性相关.𝟏𝟑.设𝑨是3阶矩阵,𝜶 ,𝜶 为𝑨分别属于特征值−1,1的特征向量,若向量𝜶 满足 𝑨𝜶 = 𝜶 +𝜶 , (cid:2869) (cid:2870) (cid:2871) (cid:2871) (cid:2870) (cid:2871) 证明:𝜶 ,𝜶 ,𝜶 线性无关. (cid:2869) (cid:2870) (cid:2871)𝟏𝟒.设4维列向量𝜶 ,𝜶 ,𝜶 线性无关,且与非零列向量𝜷 ,𝜷 均正交,证明: (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (1)𝜷 ,𝜷 线性相关;(2)𝜶 ,𝜶 ,𝜶 ,𝜷 线性无关. (cid:2869) (cid:2870) (cid:2869) (cid:2870) (cid:2871) (cid:2869)𝟏𝟓.设𝑛维列向量组𝜶 ,𝜶 ,⋯,𝜶 (𝑚 < 𝑛)线性无关,则𝑛维列向量组𝜷 ,𝜷 ,⋯,𝜷 线性无关的 (cid:2869) (cid:2870) (cid:3040) (cid:2869) (cid:2870) (cid:3040) 充分必要条件为( ) (A)向量组𝜶 ,𝜶 ,⋯,𝜶 可由向量组𝜷 ,𝜷 ,⋯,𝜷 线性表示. (cid:2869) (cid:2870) (cid:3040) (cid:2869) (cid:2870) (cid:3040) (B)向量组𝜷 ,𝜷 ,⋯,𝜷 可由向量组𝜶 ,𝜶 ,⋯,𝜶 线性表示. (cid:2869) (cid:2870) (cid:3040) (cid:2869) (cid:2870) (cid:3040) (C)向量组𝜶 ,𝜶 ,⋯,𝜶 与向量组𝜷 ,𝜷 ,⋯,𝜷 等价. (cid:2869) (cid:2870) (cid:3040) (cid:2869) (cid:2870) (cid:3040) (D)矩阵𝑨 = (𝜶 ,𝜶 ,⋯,𝜶 )与矩阵𝑩 = (𝜷 ,𝜷 ,⋯,𝜷 )等价. (cid:2869) (cid:2870) (cid:3040) (cid:2869) (cid:2870) (cid:3040)线性方程组、特征值与特征向量、二次型 𝟏.设𝑨是𝑚×𝑛矩阵,非齐次线性方程组𝑨𝒙 = 𝒃有解的充分条件是( ) (A)𝑨的行向量组线性无关. (B)𝑨的行向量组线性相关. (C)𝑨的列向量组线性无关. (D)𝑨的列向量组线性相关.𝟐.设𝑨是4×5矩阵,且𝑨的行向量组线性无关,下列说法错误的是( ) (A)齐次方程组𝑨(cid:2904)𝒙 = 𝟎只有零解. (B)齐次方程组𝑨(cid:2904)𝑨𝒙 = 𝟎必有非零解. (C)非齐次方程组𝑨𝒙 = 𝒃必有无穷多解. (D)非齐次方程组𝑨(cid:2904)𝒙 = 𝒃必有唯一解.𝟑.设𝑨 = (𝜶 ,𝜶 ,𝜶 ,𝜶 )是4阶矩阵,𝑨∗为𝑨的伴随矩阵,若(1,0,1,0)(cid:2904)是方程 (cid:2869) (cid:2870) (cid:2871) (cid:2872) 组𝑨𝒙 = 𝟎的一个基础解系,则𝑨∗𝒙 = 𝟎的基础解系可为( ) (A)𝜶 ,𝜶 . (B)𝜶 ,𝜶 . (cid:2869) (cid:2871) (cid:2869) (cid:2870) (C)𝜶 ,𝜶 ,𝜶 . (D)𝜶 ,𝜶 ,𝜶 . (cid:2869) (cid:2870) (cid:2871) (cid:2870) (cid:2871) (cid:2872)𝟒.设𝑛阶矩阵𝑨的伴随矩阵𝑨∗ ≠ 𝑶,若𝝃 ,𝝃 ,𝝃 ,𝝃 是非齐次线性方程组𝑨𝒙 = 𝒃的互不相等的 (cid:2869) (cid:2870) (cid:2871) (cid:2872) 解,则对应的齐次线性方程组𝑨𝒙 = 𝟎的基础解系( ) (A)不存在. (B)仅含一个非零解向量. (C)含有两个线性无关的解向量. (D)含有三个线性无关的解向量.𝟓.已知线性方程组 𝑥 −𝑥 −2𝑥 +3𝑥 = 0, (cid:2869) (cid:2870) (cid:2871) (cid:2872) ⎧ ⎪𝑥 −3𝑥 −5𝑥 +2𝑥 = −1, (cid:2869) (cid:2870) (cid:2871) (cid:2872) ⎨𝑥 +𝑥 +𝑎𝑥 +4𝑥 = 1, (cid:2869) (cid:2870) (cid:2871) (cid:2872) ⎪ ⎩𝑥 +7𝑥 +10𝑥 +7𝑥 = 𝑏, (cid:2869) (cid:2870) (cid:2871) (cid:2872) 讨论参数𝑎,𝑏取何值时,方程组有解、无解;并当有解时,求出方程组的通解.𝟔.设有4阶方阵𝑨满足条件|3𝑬+𝑨| = 0,𝑨𝑨(cid:2904) = 2𝑬,|𝑨| < 0,其中𝑬是4阶单位阵.求矩阵𝑨的 伴随矩阵𝑨∗的一个特征值.𝟕.设𝑨为3阶实对称矩阵,且𝑟(𝑨) = 2,若𝑨(cid:2870) = 𝑨,则𝑨的特征值为___.𝟖.若3维列向量𝜶,𝜷满足𝜶(cid:2904)𝜷 = 2,其中𝜶(cid:2904)是𝜶的转置,则矩阵𝜷𝜶(cid:2904)的三个特征值为_____.𝟗.设𝑨为2阶矩阵,𝜶 ,𝜶 为线性无关的2维列向量,𝑨𝜶 = 𝟎,𝑨𝜶 = 2𝜶 +𝜶 ,则𝑨的非零特 (cid:2869) (cid:2870) (cid:2869) (cid:2870) (cid:2869) (cid:2870) 征值为 .0 2 −3 1 −2 0 𝟏𝟎.矩阵𝑨 = (cid:3438)−1 3 −3(cid:3442)相似于矩阵𝑩 = (cid:3438)0 𝑏 0(cid:3442). 1 −2 𝑎 0 3 1 (1)求𝑎,𝑏的值; (2)求可逆矩阵𝑷,使得𝑷(cid:2879)(cid:2869)𝑨𝑷为对角矩阵.𝟏𝟏.设3阶实对称矩阵𝑨的各行元素之和均为3,向量𝜶 = (−1,2,−1)(cid:2904), (cid:2869) 𝜶 = (0,−1,1)(cid:2904)是线性方程组𝑨𝒙 = 𝟎的两个解,求正交矩阵𝑸和对角矩阵𝜦,使得𝑸(cid:2904)𝑨𝑸 = 𝜦. (cid:2870)𝟏𝟐.设二次型𝑓(𝑥 ,𝑥 ,𝑥 ) = 𝑎(𝑥(cid:2870) +𝑥(cid:2870) +𝑥(cid:2870))+2𝑥 𝑥 +2𝑥 𝑥 +2𝑥 𝑥 的正负惯性指数分别为 (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2870) (cid:2871) (cid:2869) (cid:2871) 1,2,求𝑎的取值范围.𝟏𝟑.用配方法化二次型 𝑓(𝑥 ,𝑥 ,𝑥 ) = 2𝑥 𝑥 +4𝑥 𝑥 (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2869) (cid:2871) 为标准形,并写出所用的坐标变换.𝟏𝟒.已知二次型𝑓(𝑥 ,𝑥 ,𝑥 ) = 2𝑥(cid:2870) +3𝑥(cid:2870) +3𝑥(cid:2870) +2𝑎𝑥 𝑥 (𝑎 > 0)通过正交变换化为标准形 (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2871) (cid:2870) (cid:2871) 𝑓(𝑦 ,𝑦 ,𝑦 ) = 𝑦(cid:2870) +2𝑦(cid:2870) +5𝑦(cid:2870),求参数𝑎及所用的正交矩阵𝑸. (cid:2869) (cid:2870) (cid:2871) (cid:2869) (cid:2870) (cid:2871)
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  1. CONNECT:[ UseTime:0.000426s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000583s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000271s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000348s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000489s ]
  6. SELECT * FROM `set` [ RunTime:0.000188s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000580s ]
  8. SELECT * FROM `wendang` WHERE `id` = 327425 LIMIT 1 [ RunTime:0.000478s ]
  9. UPDATE `wendang` SET `liulancishu` = 3 WHERE `id` = 327425 [ RunTime:0.006278s ]
  10. UPDATE `wendang` SET `lasttime` = 1772149428 WHERE `id` = 327425 [ RunTime:0.000606s ]
  11. SELECT * FROM `wendang` WHERE `id` < 327425 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000497s ]
  12. SELECT * FROM `wendang` WHERE `id` > 327425 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000377s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 327425 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000446s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 327425 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001543s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 327425 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000997s ]
0.084349s