Question

let a be the square matrix of order 3*3.write the value of mod of 2A where mod of A = 4

Answer 1

Since multiplying a matrice by a constant k means each term of the matrice is multiolied by that constant.So when evaluating its mod we can take k common from each of the row.Since there are 3 rows in a 3X3 matrice mod(kA)=k^3A.In your case the answer will be 8X4=32