From the matrix equation AB=AC, we can conclude B=C provided the matix A is
singular
non-singular
symmetric
none
If A is a singular matrix then Adj A is
non-singular
singular
symmetric
skew symmetric
If A is any m x n matrix such that AB and BA
are both defined, then B is a matrix of type
m xn
n x m
m x m
n x n
The inverse of a symmetric matrix is a matrix which is
diagonal
symmetric
skew-symmetric
none
If A and B are symmetric matices of the same order then AB-BA is a matrix which is
null
unit
symmetric
skew symmetric