Sr Examen

Ecuación diferencial y’’’+9y’=cos(3x)

El profesor se sorprenderá mucho al ver tu solución correcta😉

v

Para el problema de Cauchy:

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

Gráfico:

interior superior

Solución

Ha introducido [src]
               3                 
  d           d                  
9*--(y(x)) + ---(y(x)) = cos(3*x)
  dx           3                 
             dx                  
$$9 \frac{d}{d x} y{\left(x \right)} + \frac{d^{3}}{d x^{3}} y{\left(x \right)} = \cos{\left(3 x \right)}$$
9*y' + y''' = cos(3*x)
Respuesta [src]
                          /     x \         
y(x) = C1 + C3*sin(3*x) + |C2 - --|*cos(3*x)
                          \     18/         
$$y{\left(x \right)} = C_{1} + C_{3} \sin{\left(3 x \right)} + \left(C_{2} - \frac{x}{18}\right) \cos{\left(3 x \right)}$$
Clasificación
nth linear constant coeff undetermined coefficients
nth linear constant coeff variation of parameters
nth order reducible
nth linear constant coeff variation of parameters Integral