s251ex1(sp10)

s251ex1(sp10) - y = 1 is semistable. (c) 1 (d) y ( t ) = -1...

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MATH 251 Exam I February 25, 2010 ANSWER KEY 1. (a) first (b) No (c) Yes (d) Yes (e) C t t t y + - + = 2 2 6 2 3 2 2. 2 2 t e - = μ 3. A 4. A 5. D 6. B 7. B 8. C 9. C 10. A 11. D 12. (a) y = -1, 0, 1 (b) y = -1 is (asymptotically) stable, y = 0 is unstable,
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Unformatted text preview: y = 1 is semistable. (c) 1 (d) y ( t ) = -1 13. (a) t t c e C e C y 4 2 1 + = (b) E (c) D (d) K 14. (a) u ( t ) = 2 e-t sin 2 t (b) π (c) False (d) 5 8 > γ...
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This note was uploaded on 07/16/2011 for the course MATH 251 taught by Professor Chezhongyuan during the Spring '08 term at Penn State.

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