What is the determinant of a matrix used for?
1 Answer
Jun 1, 2015
The determinant of a matrix
You can know a few things with it :

#A# is invertible if and only if#Det(A) != 0# . 
#Det(A^(1)) = 1/(Det(A))# 
#A^(1) = 1/(Det(A)) * ""^t((1)^(i+j)*M_(ij))# ,
where
where
where
and where