Book
Linear Algebra
Author
Gilbert Strang
Edition
A=matrix([[2,-1,0],[-1,2,-1],[0,-1,2]]) A11=matrix([[2,-1],[-1,2]]) A11.det() A12=matrix([[-1,-1],[0,2]]) A12.det() A13=matrix([[-1,2],[0,-1]]) A13.det() A21=matrix([[-1,0],[-1,2]]) A21.det() A22=matrix([[2,0],[0,2]]) A22.det() A23=matrix([[2,-1],[0,-1]]) A23.det() A31=matrix([[-1,0],[2,-1]]) A31.det() A32=matrix([[2,0],[-1,-1]]) A32.det() A33=matrix([[2,-1],[-1,2]]) A33.det() #cofactror of A is C=matrix([[3,-2,1],[1,4,-2],[1,-2,3]]) D=C.transpose() E=A*D
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