If matrices AB = 0
A = 0 or B = 0
A = 0 and B = 0
It is not necessary that A = 0 or B = 0
Above statements are wrong
6
9
7
-9
2
1
3
4
and A2 is an identity matrix, then x =
0
a b c
4abc
4a2b2c2
a2b2c2
If there are 13 elements in matrix then possible size of this matrix is
13
x + y + z
x y z
-5, 2
5, 2
5, -2
-6, 3
If n ≠ 3k, 1, ω, ω2 are cube roots of unity ,then
ω
ω2
