If A is 3 x 4 matrix and B is a matrix such that A'B and B A' are both defined.Then B is of the type.
4 x 3
3 x 4
3 x 3
4 x 4
If A is a squre matrix, then A - A' is _____________.
Unit matrix
Null matrix
A
Skew symmetric matrix
A matrix is _______.
A collection of real numbers
A collection of real or complex numbers
An array of real numbers
An array of real or complex numbers
If A = [aij]mxn is a square matrix if
m < n
m > n
m = n
None of these
If the matrix AB is zero, then _________.
A = 0 or B = 0
A = 0 and B = 0
It is not necessary that either A = 0 or B should be 0
All the above statements are wrong
A 3×4 matrix whose elements are
, then A2 is equal to
-A
The number of all possible matrices of order 3 × 3 with each entry 0 or 1 is
27
18
81
512
If A is ( aij ) m × n and B = ( bjk ) m × p, then order of AB is ___________.
m × n
m × p
p × m
