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# 2x2 Symmetric Matrix with Positive Eigenvalues.

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Suppose that both eigenvalues of a 2 x 2 symmetric matrix B are positive. Which of the following statements are true?

i) The system Bx = b has a unique solution for each b.
ii) B is positive definite.
iii) The system dx = Bx is stable.
__
dt

A. i) only
B. ii) only
C. iii) only
D. i) and ii)
E. All of these

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