If A is singular then AB is also singular A B are both n tim
     If A is singular then AB is also singular A, B are both n times n matrices 
  
  Solution
Given A is a singular matrix then
det(A)=0
Also given that A and B are square matrices of order n
By the properties of determinant det(AB) =det(A) det(B)
Since det(A) =0
det(AB)=0*det(B)
det(AB) =0
Therefore if A is singular then ABC is also singular

