1)

 If  A=[2312]  , B=[1031] , then B-1 A-1 =


A) [2amp;37amp;11]

B) [2amp;37amp;11]

C) [2amp;37amp;11]

D) [2amp;37amp;11]

Answer:

Option B

Explanation:

We have 

      A=[2312] 

and    B=[1031]

AB=[2312][1031]

AB=[11372]

 |AB|=22-21=1

    (AB)1=[23711]

      We know that 

B1A1=(AB)1

     B1A1=[23711]