Internal problem ID [425]
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 10.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
Solve \begin {gather*} \boxed {3 y^{\prime \prime }+y^{\prime } x -4 y=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.003 (sec). Leaf size: 34
Order:=6; dsolve(3*diff(y(x),x$2)+x*diff(y(x),x)-4*y(x)=0,y(x),type='series',x=0);
\[ y \relax (x ) = \left (1+\frac {2}{3} x^{2}+\frac {1}{27} x^{4}\right ) y \relax (0)+\left (x +\frac {1}{6} x^{3}+\frac {1}{360} x^{5}\right ) D\relax (y )\relax (0)+O\left (x^{6}\right ) \]
✓ Solution by Mathematica
Time used: 0.001 (sec). Leaf size: 42
AsymptoticDSolveValue[3*y''[x]+x*y'[x]-4*y[x]==0,y[x],{x,0,5}]
\[ y(x)\to c_2 \left (\frac {x^5}{360}+\frac {x^3}{6}+x\right )+c_1 \left (\frac {x^4}{27}+\frac {2 x^2}{3}+1\right ) \]