Ch-4.1-exam-15-new-오충헌

1909 days ago by matrix

A=matrix(QQ, 3, 3, [1, 1, 2, 2, 3, 3, 4, 4, 5]) Ai=A.inverse() print "det(A)=", A.det() print "det(A^(-1))=", Ai.det() 
       
det(A)= -3
det(A^(-1))= -1/3
det(A)= -3
det(A^(-1))= -1/3