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Ecuación diferencial x³y′′′+3x²y′′+xy′+y=x+lnx

El profesor se sorprenderá mucho al ver tu solución correcta😉

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Para el problema de Cauchy:

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

Gráfico:

interior superior

Solución

Ha introducido [src]
                  3                2                          
  d           3  d             2  d                           
x*--(y(x)) + x *---(y(x)) + 3*x *---(y(x)) + y(x) = x + log(x)
  dx              3                2                          
                dx               dx                           
$$x^{3} \frac{d^{3}}{d x^{3}} y{\left(x \right)} + 3 x^{2} \frac{d^{2}}{d x^{2}} y{\left(x \right)} + x \frac{d}{d x} y{\left(x \right)} + y{\left(x \right)} = x + \log{\left(x \right)}$$
x^3*y''' + 3*x^2*y'' + x*y' + y = x + log(x)
Respuesta [src]
                            /  ___       \               /  ___       \         
       x   C1        ___    |\/ 3 *log(x)|        ___    |\/ 3 *log(x)|         
y(x) = - + -- + C2*\/ x *sin|------------| + C3*\/ x *cos|------------| + log(x)
       2   x                \     2      /               \     2      /         
$$y{\left(x \right)} = \frac{C_{1}}{x} + C_{2} \sqrt{x} \sin{\left(\frac{\sqrt{3} \log{\left(x \right)}}{2} \right)} + C_{3} \sqrt{x} \cos{\left(\frac{\sqrt{3} \log{\left(x \right)}}{2} \right)} + \frac{x}{2} + \log{\left(x \right)}$$
Clasificación
nth linear euler eq nonhomogeneous undetermined coefficients
nth linear euler eq nonhomogeneous variation of parameters
nth linear euler eq nonhomogeneous variation of parameters Integral