If A and B are two matrices such that.
AB = B and BA = A, then A2 + B2 =
2 A B
2 B A
A + B
A B
If A and B are two matrices such that AB = B and BA = A, then A2 + B2 =
2AB
2BA
AB
, then 2A -3B =
A column matrix has only ____________.
One element
One row with one or more columns
One column with one or more rows
One row and one column
Matrix A has x rows and x+5 columns. Matrix B has y rows and 11-y columns. Both AB and BA exist. Then the value of x and y is equal to
(3,9)
8,3
3,8
4,8
14
None of these
