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$\mbox{None of the above}$

$\mbox{unstable if at least one eigenvalue of} \ A \ \mbox{has positive real part.}$

$\mbox{unstable if all the eigenvalues of} \ A \ \mbox{have positive real part.}$

$\mbox{unstable if all the eigenvalues of} \ A \ \mbox{have negative real part.}$

$\mbox{unstable if at least one eigenvalue of} \ A \ \mbox{has negative real part.}$

Test:	DELA-Section 4.2-Stability of linear systems-Hard
Number of Questions:	4
Time:

	$\mbox{unstable, since all eigenvalues of} \ A \ \mbox{are negative}$
	$\mbox{None of the above}$
	$\mbox{stable, since all eigenvalues of} \ A \ \mbox{are positive}$
	$\mbox{stable, since all eigenvalues of} \ A \ \mbox{are negative}$
	$\mbox{unstable, since all eigenvalues of} \ A \ \mbox{are positive}$

	$\mbox{Stable, because all the eigenvalues of} \ A \ \mbox{have negative real part.}$
	$\mbox{Unstable, because at least one eigenvalue of} \ A \ \mbox{has positive real part.}$
	$\mbox{Stable, because at least one eigenvalue of} \ A \ \mbox{has positive real part.}$
	$\mbox{Unstable, because all the eigenvalues of} \ A \ \mbox{have negative real part.}$
	$\mbox{None of the above}$

	$\mbox{Every solution of the first system and of the second system is unstable.}$
	$\mbox{None of the above}$
	$\mbox{Every solution of the first system and of the second system is stable.}$
	$\mbox{Every solution of the first system is stable, but every solution of the second system is unstable.}$
	$\mbox{Every solution of the first system is unstable, but every solution of the second system is stable.}$

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