A.A≠0 B.A=0 C.∣A∣≠0 D.∣A∣=0
A.AAT B.ATA C.A-AT D.A+AT
A.[(A-1)-1]T B.[(AT)]-1=[(A-1)-1]T C.(Ak)-1=(A-1)=(A-1)k(k為正整數(shù)) D.∣A-1∣=∣A∣-1