Book
Linear Algebra
Author
Gilbert Strang
Edition
A=matrix([[1,1,1],[-1,2,1],[2,1,-3]]) b=vector([4,8,-9]) C=b.transpose() print "matrix A is:" print A P=A.det() print "print det of A:",p P=A.augment(C) print P P.swap_columns(3,0) P1=P[:,:3] print "matrix P1 is:" print P1 p1=P1.det() print "print det of P1:" print p1 P=A.augment(C) P.swap_columns(3,1) P2=P[:,:3] print "matrix P2 is:",P2 p2=P2.det() print "print det of P2:" print p2 P=A.augment(C) P.swap_columns(3,2) P3=P[:,:3] print "matrix P3 " print P3 p3=P3.det() print "print det of P3:",p3 x=p1/p y=p2/p z=p3/p print x,y,z
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