Prove that : (i) `" adj " I=I` (ii) `" adj " O=O` (iii) ` I^(-1)=I`.

Prove that : adj. I_(n)=I_(n)

Prove that: adj.I_n=I_n

Prove that : adj.O=O

Prove that: adj.O=O

Prove that: adj.I_n^-1=I_n

If A = [(3,-3,4),(2,-3,4),(0,-1,1)] , then which of the following is false ? (i) adj (adj A) = A (ii) ladj (adj A)|= 1 (iii) ladj A| = 1 (iv) None of these

If A = [(a,b),(c,d)] show that, (i) adj (adj.A) = A (ii). (A^(-1))^(-1) = A .

If A =[(-1,1,1),(1,-1,1),(1,1,-1)] find the values of (i) |A||adj A| " " (ii) |adj (adj (adjA))| (iii) |adj(3A)| " " (iv) adj (adj A)

If A = =[(-1,1,1),(1,-1,1),(1,1,-1)] find the values of (i) |A||adj A| " " (ii) |adj (adj (adjA))| (iii) |adj(3A)| " " (iv) adj adj A

If A = =[(-1,1,1),(1,-1,1),(1,1,-1)] find the values of (i) |A||adj A| " " (ii) |adj (adj (adjA))| (iii) |adj(3A)| " " (iv) adj adj A