Book
Linear Algebra
Author
Gilbert Strang
Edition
A=matrix([[-1,1,2],[3,-1,1],[-1,3,4]]) A_11=det(matrix([[-1,1],[3,4]])) A_21=det(matrix([[-1,-2],[-3,-4]])) A_31=det(matrix([[1,2],[-1,1]])) A_12=det(matrix([[-3,-1],[1,-4]])) A_22=det(matrix([[-1,2],[-1,4]])) A_32=det(matrix([[1,-2],[-3,-1]])) A_13=det(matrix([[3,-1],[-1,3]])) A_23=det(matrix([[1,-1],[1,-3]])) A_33=det(matrix([[-1,1],[3,-1]])) B=matrix([[A_11,A_21,A_31],[A_12,A_22,A_32],[A_13,A_23,A_33]]) D=det(A) A_inv=B/D print(A_inv)
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