Internal problem ID [1233]
Book: Elementary differential equations with boundary value problems. William F. Trench.
Brooks/Cole 2001
Section: Chapter 7 Series Solutions of Linear Second Equations. 7.2 SERIES SOLUTIONS NEAR AN
ORDINARY POINT I. Exercises 7.2. Page 329
Problem number: 35.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
Solve \begin {gather*} \boxed {\left (x^{3}+1\right ) y^{\prime \prime }+7 y^{\prime } x^{2}+9 y x=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.004 (sec). Leaf size: 24
Order:=6; dsolve((1+x^3)*diff(y(x),x$2)+7*x^2*diff(y(x),x)+9*x*y(x)=0,y(x),type='series',x=0);
\[ y \relax (x ) = \left (1-\frac {3 x^{3}}{2}\right ) y \relax (0)+\left (x -\frac {4}{3} x^{4}\right ) D\relax (y )\relax (0)+O\left (x^{6}\right ) \]
✓ Solution by Mathematica
Time used: 0.001 (sec). Leaf size: 28
AsymptoticDSolveValue[(1+x^3)*y''[x]+7*x^2*y'[x]+9*x*y[x]==0,y[x],{x,0,5}]
\[ y(x)\to c_2 \left (x-\frac {4 x^4}{3}\right )+c_1 \left (1-\frac {3 x^3}{2}\right ) \]