Q3 of 307 Page 5

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


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2

Show that AB ≠ BA in each of the following cases:

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Show that AB ≠ BA in each of the following cases:

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3

Compute the products AB and BA whichever exists in each of the following cases:

and

3

Compute the products AB and BA whichever exists in each of the following cases:

and