Q6 of 29 Page 1

If A = and B = [1 3 -6], verify that (AB)’ = B’A’.


⇒ AB = -2 + 12 – 30 = [-20]


⇒ (AB)’ = [-20] … (1)



⇒ B’A’ = -2 + 12 – 30 = [-20] … (2)


From (1) and (2),


⇒ (AB)’ = B’A’


Hence proved.


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