1 . 关于矩阵乘法下列说法中正确的是( ).
A.不满足交换律,但满足消去律 | B.不满足交换律和消去律 |
C.满足交换律不满足消去律 | D.满足交换律和消去律 |
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2 . 下面给出矩阵的一些性质中正确的是( ).
A.![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() | D.![]() |
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3 . 已知
,
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3a1792c8a27289dcabe21bdee2b92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5e7c5ff57bd768667cf19834ab0682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62d712f7ded863e7695e0133e15a15c.png)
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4 . 有这样一对矩阵
,
,通过计算发现
与
相等,即满足“
”.
请举出一对满足“
”要求的二阶矩阵
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d947e6a650c700ed1fab01b4b10fa6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3722bda479c3d9229b99dc4f1c8fec71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93a42a8537d582e74cfac36d1d5f12a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc166a17c8ce4b34134d13ac03f2005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9bee7a3e6a2c01e3196fd1dbe40cb4.png)
请举出一对满足“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9bee7a3e6a2c01e3196fd1dbe40cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd82ec347d41082b344beb6dba4c6d2.png)
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5 . 已知矩阵
,
,
,求:
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64275b96308af4f4539f669e95bdd496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec8aeb232f6f7112ffd618e01e535d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5855dc40a700ffab32e6a976c7a5c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f217f0146f6586844f73653849dd489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f65a03ad0f9172f992f42ae3bbb465e.png)
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6 . 行列式
中,7的余子式为_______ ,代数余子式为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688874e3315c5ebabe8fffb08de608c7.png)
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7 . 在三阶行列式
中,5的余子式的值是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658e27e73612c0fe4835194d1bd44fb1.png)
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8 . 已知矩阵
,定义其转置矩阵
.若
,写出A的转置矩阵
,并求行列式
与
.说明两者有什么关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8557b8dc9f2f6e3ca35d0a3cab09163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d752fefe78383a588d4392b9a6f45f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94f2c3124b7cb5d13997be34e586e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7856b843caf384fca612ce663f21c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4978089eb165d2241a35275396794d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3306dd450af7eccb7aadaa0bc4303666.png)
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9 . 计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da95bc061b8d30f544f43ba4ee298458.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da95bc061b8d30f544f43ba4ee298458.png)
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10 . 将
表示成一个三阶行列式为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2381668f5db54a7fa892766e9de93b48.png)
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