Internal problem ID [445]
Book: Differential equations and linear algebra, 4th ed., Edwards and Penney
Section: Chapter 11 Power series methods. Section 11.2 Power series solutions. Page 624
Problem number: problem 30.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [_Lienard]
Solve \begin {gather*} \boxed {x y^{\prime \prime }+\sin \relax (x ) y^{\prime }+y x=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 44
Order:=6; dsolve(x*diff(y(x),x$2)+sin(x)*diff(y(x),x)+x*y(x)=0,y(x),type='series',x=0);
\[ y \relax (x ) = \left (1-\frac {1}{2} x^{2}+\frac {1}{6} x^{3}-\frac {1}{60} x^{5}\right ) y \relax (0)+\left (x -\frac {1}{2} x^{2}+\frac {1}{18} x^{4}-\frac {7}{360} x^{5}\right ) D\relax (y )\relax (0)+O\left (x^{6}\right ) \]
✓ Solution by Mathematica
Time used: 0.001 (sec). Leaf size: 56
AsymptoticDSolveValue[x*y''[x]+Sin[x]*y'[x]+x*y[x]==0,y[x],{x,0,5}]
\[ y(x)\to c_2 \left (-\frac {7 x^5}{360}+\frac {x^4}{18}-\frac {x^2}{2}+x\right )+c_1 \left (-\frac {x^5}{60}+\frac {x^3}{6}-\frac {x^2}{2}+1\right ) \]