NCERT Miscellaneous Exercise Q4 - Determinants
Question: Let A=[[1,-2,1],[2,3,1],[1,-1,5]] as printed (with the book's sign pattern). Verify (i) (adj A)^{-1}=adj(A^{-1}) and (ii) (A^{-1})^{-1}=A.
Answer: Verified.
Full step-by-step NCERT solution with diagrams on Something by Zero.