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Ecuación diferencial y''''+y'''-5y''+y'-6y=x*cos(x)+sin(x)

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Para el problema de Cauchy:

y() =
y'() =
y''() =
y'''() =
y''''() =

Gráfico:

interior superior

Solución

Ha introducido [src]
              2                      3           4                          
             d          d           d           d                           
-6*y(x) - 5*---(y(x)) + --(y(x)) + ---(y(x)) + ---(y(x)) = x*cos(x) + sin(x)
              2         dx           3           4                          
            dx                     dx          dx                           
$$- 6 y{\left(x \right)} + \frac{d}{d x} y{\left(x \right)} - 5 \frac{d^{2}}{d x^{2}} y{\left(x \right)} + \frac{d^{3}}{d x^{3}} y{\left(x \right)} + \frac{d^{4}}{d x^{4}} y{\left(x \right)} = x \cos{\left(x \right)} + \sin{\left(x \right)}$$
-6*y + y' - 5*y'' + y''' + y'''' = x*cos(x) + sin(x)
Respuesta [src]
                            /               2\          /       2       \       
           -3*x       2*x   |     9*x    7*x |          |      x    13*x|       
y(x) = C3*e     + C4*e    + |C1 - ---- - ----|*sin(x) + |C2 - --- + ----|*cos(x)
                            \     1000   200 /          \     200   1000/       
$$y{\left(x \right)} = C_{3} e^{- 3 x} + C_{4} e^{2 x} + \left(C_{1} - \frac{7 x^{2}}{200} - \frac{9 x}{1000}\right) \sin{\left(x \right)} + \left(C_{2} - \frac{x^{2}}{200} + \frac{13 x}{1000}\right) \cos{\left(x \right)}$$
Clasificación
nth linear constant coeff undetermined coefficients
nth linear constant coeff variation of parameters
nth linear constant coeff variation of parameters Integral