Question 317501
[A]={{{(matrix(3,3,2,1,0,0,2,1,1,0,-1))}}}
.
.
.
det[A]={{{-3}}}
.
.
.
[A]inv={{{-(1/3)*(matrix(3,3,-2,1,1,1,-2,-2,-2,1,4))}}}