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1.
If
than the values of 
, 
and 
are respectively
than the values of , and are respectively
2.
Inverse of the matrix 
3.
If 
and 
is the inverse of 
, then the value of 
is
and is the inverse of , then the value of is
4.
and
then
is
andthenis
5.
If 
then 
is
then is
6.
If 
then adj() is equal to
then adj() is equal to
7.
The rank of a null matrix is
8.
If and are matrices of the same order, then 
is possible, iff
and are matrices of the same order, then is possible, iff
9.
If A=
and
, then equals
and, then equals
10.
If the system of equations
Has a non-trivial solution, then the value of
Has a non-trivial solution, then the value of