question_answer 1)

For the matrices A and B, verify that (AB)? = B?A?, where       (i)       (ii)  

Answer:

(i)       And B = [?1   2   1]1×3             and       Now              ? (1)       Now, B?A?             From (1) and (2), we get             (AB)? = B?A?       Hence verified.       (ii)         and B = [1  5   7]1×3         A?= [0  1  2]1×3       and       Now                                ?. (1)       Now,                   From (1) and (2), we get       (AB)? = B?A?       Hence verified.