1) If A=[2312] , B=[1031] , then B-1 A-1 = A) [−2amp;−3−7amp;11] B) [2amp;−3−7amp;11] C) [2amp;37amp;11] D) [−2amp;−3−7amp;−11] Answer: Option BExplanation:We have A=[2312] and B=[1031] AB=[2312][1031] AB=[11372] |AB|=22-21=1 ∴ (AB)−1=[2−3−711] ∴ We know that B−1A−1=(AB)−1 ∴ B−1A−1=[2−3−711]