If `A=[(1,2,0),(-1,1,2),(2,-1,1)]` then det` (Adj(AdjA))=` (A) 13 (B) `13^2` (C) `13^4` (D) none of these

If A=[(1,2,-1),(-1,1,2),(2,-1,1)] , then det (adj (adjA)) is

If A=[1 2 0-1 1 2 2-1 1],t h e ndet(A d j(A d jA))= 13 (b) 13^2 (c) 13^4 (d) None of these

If A=[(2,0,0),(0,cos,sinx),(0,-sinx,cosx)] then (AdjA)^-1= (A) 1/2A (B) A (C) 2A (D) 4A

If A=|{:(1,1,1),(1,2,-3),(2,-1,3):}| , then show that A. (ajd.A)= (adj.A)A.

Let A=[(x,2,-3),(-1,3,-2),(2,-1,1)] be a matrix and |adj(adjA)|=(12)^(4) , then the sum of all the values of x is equal to

If [(2+x,3,4),(1,-1,2),(x,1,-5)] is a singular matrix then x is (A) 13/25 (B) -25/13 (C) 5/13 (D) 25/13

If z=1/((2+3i)^2), then |z| is (a) . 1/13 (b) . 1/5 (c) . 1/12 (d) . none of these

If 1^2+2^2+3^2+n^2=1015 then the value of n is equal to (A) 13 (B) 14 (C) 15 (D) none of these

If A=[{:(3,-3,4),(2,-3,4),(0,-1,1):}] , then the trace of the matrix Adj(AdjA) is

A=[{:(1,0,k),(2, 1,3),(k,0,1):}] is invertible for