If A is an n ×n matrix then l adj A l =
l A l n-1
l A l n-2
l A l n
l A l
then A12 is.
, then |AB| =
80
100
-110
92
The characteristic root of the matrix are
1,3,6
1,2,4
4,5,6
2,4,6
, then the value of x, y and z are respectively
5,2,2
1, -2,3
0, -3, 3
-11, 8, 3
, then UV +XY =
[20]
20
[-20]
-20
-2
2
-4
4
AB does not exist
A is orthogonal if AAT =
A
I
A-1
|A|I
The inverse of a symmetric matrix is
symmetric
skew symmetric
diagonal matrix
none of these
