If A is a `4xx5` matrix and B is a matrix such that `A^(T)B` and `BA^(T)` both are defined, then write the order of B.

If A is a 4xx5 matrix and B is a matrix such that A^TB and BA^T both are defined, then write the order of B.

if A is a 3xx3 matrix and |A| = 3, then write the matric represented by AxxadjA .

If alpha "and" beta , are scalars such that A = alpha B+beta I , where A,B and the unit matrix I are of the same order, then prove that AB=BA.

If A is a square matrix of order 3 and |A|=3 ,then write the matrix represented by A.Adj A.

Write a 3xx3 skew -symmetric matrix .