Unformatted text preview: 2 x 3x 2 y + e x + y = 4 . 9. y ( t ) = 3 e2 t cos 3 te2 t sin 3 t 10. y ( t ) = C 1 t + C 2 t ln t 11. (a) Q = 1001 200 Q, Q (0) = 0 ; (b) Q ( t ) = 2000020000 et 200 ; (c) t = 200 ln 2 ; (d) lim t →∞ Q ( t ) = 20000 g ....
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 Spring '08
 CHEZHONGYUAN
 Math, Differential Equations, Equations, Partial Differential Equations, Rate equation, e−2t sin

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