if A is a square matrix of order 3 such that adj(2A) = k adj(A) , then wite the value of k..

If A is a square matrix.. then adj(kA) = k^n-1(adjA) where n is order of the matrix..

here , n= 3 & k = 2  

hence , adj(2A) = 2^3-1(adjA) = 4(adjA) 

so , k=4....