If `A=[(1,1,0),(0,1,1),(0,0,1)]` then `A^(2)=`

If A^-1 = [(1,-1,0),(0,-2,1),(0,0,1)] then (A) A is non-singular (B) A is skew symmetric (C) |A|=2 (D) AdjA= [(1/2,- 1/2,0),(0,-1,1/2),(0,0,- 1/2)]

If A=[(1,-1,0),(1,0,0),(0,0,-1)] , then A^(-1) is

If A=[(1,-1,0),(1,0,0),(0,0,-1)] , then A^(-1) is...a) A^T b) A^2 c) A d) I

If A={:[(0,1,0),(1,0,0),(0,0,1)]:}," then "A^(-1)=

If {:A=[(1,0,0),(0,1,0),(a,b,-1)]:} , then A^2 is equal to