设矩阵A=
(20
-11),
B=
(11
01),
C=
(3-2
-21),
分别计算|ABC|与|A|•|B|•|C|.
【正确答案】:ABC=
(2 0
-1 1)
(1 1
0 1)
(3 -2
-9 1)
=
(2 2
-1 0)
(3 -2
-2 1)
=(2 -2
-3 2)
|ABC|=
|2 -2|
|-3 2|
=-2.
|A|•|B|•|C|=2×1×(3-4)=-2.
设矩阵A= (20 -11), B= (11 01), C= (3-2 -21), 分别计算|ABC|与|A|•|B
- 2024-11-07 03:12:50
- 线性代数(工)(13175)