y'' + 4y' + 4y = e^(-2t)ln(t)
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y'' + 9y = sec^2(3t)
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undetermined coefficients, diff eq, sect4.5#19
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y'' + 4y = csc^2(2t)
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Un MONSTRE absolu d'intégrale
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solving the differential equation y''+y=tan(t) by variation of parameters
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Oral X-ESPCI #1 : EZ ? (Partie 1)
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But what is a partial differential equation? | DE2
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