If AB = A and BA = B , then A2 , B2 equal to
A,B
-A,-B
2A,B
None of these
If there are 13 elements in matrix the possible size of this matrix is.
1 × 13, 13 × 1
1 × 26, 26 × 1
2 × 13, 13 × 2
13 × 13
skew symmetric matrix
symmetric matrix
diagonal matrix
upper triangular matrix
If A, B, C are matrices of order n × n then (ABC)' =
A'B'C'
C'B'A
B'C'A
B'A'C'
, then 2A -3B =
Which of the following statements is true ?
The inverse of non-singular matrix is not unique.
The determinant of non-singular matrix is zero.
If A'=A, then A is a square matrix
If l A l ≠ 0, then l A . adj A l = i A l n-1 where A -[aij]n x n
If there are 13 elements in matrix then possible size of this matrix is ___________
1 x 13, 13 x 1
1 x 26, 26 x 1
2 x13, 13 x 2
13 x 13
If A is square matrix of order n and A = kB where K is a scolar, then | A | =
| B |
k |B|
Kn |B|
n | B|
x = -3, y = -2
x = 3, y =-2
x = 3 , y = 2
x = -3, y = 2
