Compute the products AB and BA whichever exists in each of the following cases:
and 
So
since the order of A is 2
2 and order of B is 2
3,
so AB is possible but BA is not the possible order of AB is 2
3.
AB
Hence
And BA does not exits
3
Compute the products AB and BA whichever exists in each of the following cases:
and
So
since the order of A is 22 and order of B is 23,
so AB is possible but BA is not the possible order of AB is 23.
AB
Hence
And BA does not exits