, then |AB| =
80
100
-110
92
for x ≠ 0, y ≠ 0, then D is
divisible by neither x nor y
divisible by x but not y
divisible by y but not x
divisible by both x and y
, then A100 is equal to
2100 A
299A
100 A
299 A
-2
2
-4
4
If A is a square matrix, then
A + AT is symmetric
AAT is skew - symmetric
AT + A is skew - symmetric
AT A is skew symmetric
a ( x + y + z )
0
abc + xyz + pqr
a ( x + y + z ) + b ( p + q + r ) + c
The inverse of is.
Does not exit
, then A3 - 4 A2 + 3 A + I =
3 I
I
-I
-2 I
Then sum of the products of the elements of any row of a determinant A with the co-factors of the corresponding elements is equal to
1
|A|
1/2 [A]
If A and B are symmetric matrices, then matrix A+B is
Symmetric matrix
skew symmetric matrix
unit matrix
conjugate matrix
