In Exercises 1-4, confirm by multiplication that x is an eigenvector of A, and find the corresponding eigenvalue. 1. A = [1 2] [5 2. A = 4 1] 3. A = |2 3 1 4 2 -1 4. A =-1 2 -1; x = | 1 -1 2]

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A:

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A: