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OpenStudy (anonymous):
please, can anyone help me solve this differential eqn? I really can't figure it out. Thanks. :)
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OpenStudy (anonymous):
y"=-9y+4
OpenStudy (anonymous):
y" + 9y = 4 has discriminant < 0 Let y" = 0 --> y = 4/9 y" + 9y = 0 r = + 3i , - 3i => y = C1e^3ix + C2 e^(-3ix) + 4/9
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