Let A denote the 2 x 2 matrix (a) Show that the characteristic equation of A (Eq.

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Let A denote the 2 x 2 matrix

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(a) Show that the characteristic equation of A (Eq. (3), Section 6.1) is given by

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(b) Suppose that the eigenvalues of A are pure imaginary. Show that the trace T (A) = a +d of A must be zero and that the determinant D(A) = ad - bc must be positive. Conclude that c ≠ 0.

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Differential Equations And Linear Algebra

ISBN: 9780134497181

4th Edition

Authors: C. Edwards, David Penney, David Calvis

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