DIFFERENTIAL EQUATIONS PRACTICE PROBLEMS: ANSWERS
10. The reduced row echelon form for the matrix Abelow has been computed by Matlab: A= 2 −4 −12 −36 1−5 5 −10 −4 −1 rref(A)= 1 −203 00 14 00 00 Use this to find all solutions of 2x1 −4x2 −x3 =2 −3x1 +6x2 +x3 = −5 5x1 −10x2 −4x3 = −1 and express your answer in vector form.
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