The number of `nxxn` matrix A and B such that AB - BA = I is. . .

The number of n xx n matrix A and B such that AB-BA=I is.

The number of matrices of A of order 2xx2 such that AB-BA=l, where B is a given matrix,

The number of matrices of A of order 2xx2 such that AB-BA=l, where B is a given matrix,

A is a 3xx4 matrix .A matrix B is such that A'B and BA' are defined . Then the order of B is ……..

If A is a matrix of size nxxn such that A^(2) + A + 2I = O then

Let A be a nxxn matrix such that A ^(n) = alpha A, where alpha is a real number different from 1 and - 1. The matrix A + I_(n) is

Let A be a nxxn matrix such that A ^(n) = alpha A, where alpha is a real number different from 1 and - 1. The matrix A + I_(n) is

Let A be a nxxn matrix such that A ^(n) = alpha A, where alpha is a real number different from 1 and - 1. The matrix A + I_(n) is

Let A be a nxxn matrix such that A ^(n) = alpha A, where alpha is a real number different from 1 and - 1. The matrix A + I_(n) is

If A is any mxn matrix and B is a matrix such that AB and BA are both defined, then B is a matrix of order