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# A9 - 6 = 0 is an eigenvalue of A Let ~ z = ~x i~ y be an...

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Math 235 Assignment 9 Due: Wednesday, July 21st 1. Suppose that a real 2 × 2 matrix A has 2 + i as an eigenvalue with a corresponding eigenvector ± 1 + i i ² . Determine A . 2. Determine a real canonical form of A = 0 - 2 1 2 2 - 1 0 - 2 2 and give a change of basis matrix P the bring the matrix into this form. 3. Let V be a vector space over C and T : V V a linear operator. Prove that Null( T ) and Range( T ) are invariant subspaces of T . 4. Suppose that A is an n × n matrix with real entries, and that λ = a + bi , b
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Unformatted text preview: 6 = 0 is an eigenvalue of A . Let ~ z = ~x + i~ y be an eigenvector of A corresponding to Î» . Prove that ~x 6 = ~ 0, ~ y 6 = ~ 0 and that ~x 6 = k~ y . 5. Suppose that A is an n Ã— n matrix with real entries, and that Î» = a + bi , b 6 = 0 is an eigenvalue of A . Let ~ z = ~x + i~ y be an eigenvector of A corresponding to Î» . Prove that Span { ~x,~ y } contains no real eigenvector of A . 1...
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