Q. If A is a 3 X 3 invertible matrix, then what will be the value of k if d e t A - 1 = d e t A k Share with your friends Share 2 Neha Sethi answered this Dear student detA-1=detAk ...1We know that A.A-1=IdetA.A-1=detIdetA.detA-1=detI ∵If A and B are square matrices of same order then detAB=detA.detBdetA-1=1detA using detI=1detA-1=detA-1 ...2From 1 and 2 we getk=-1 Regards 6 View Full Answer
