Internal problem ID [1447]
Book: Elementary differential equations with boundary value problems. William F. Trench.
Brooks/Cole 2001
Section: Chapter 7 Series Solutions of Linear Second Equations. 7.6 THE METHOD OF FROBENIUS
III. Exercises 7.7. Page 389
Problem number: 31.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
Solve \begin {gather*} \boxed {4 x^{2} y^{\prime \prime }+8 y^{\prime } x -\left (-x^{2}+35\right ) y=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.011 (sec). Leaf size: 35
Order:=6; dsolve(4*x^2*diff(y(x),x$2)+8*x*diff(y(x),x)-(35-x^2)*y(x)=0,y(x),type='series',x=0);
\[ y \relax (x ) = \frac {c_{1} x^{6} \left (1-\frac {1}{64} x^{2}+\frac {1}{10240} x^{4}+\mathrm {O}\left (x^{6}\right )\right )+c_{2} \left (-86400-2700 x^{2}-\frac {675}{8} x^{4}+\mathrm {O}\left (x^{6}\right )\right )}{x^{\frac {7}{2}}} \]
✓ Solution by Mathematica
Time used: 0.01 (sec). Leaf size: 58
AsymptoticDSolveValue[4*x^2*y''[x]+8*x*y'[x]-(35-x^2)*y[x]==0,y[x],{x,0,5}]
\[ y(x)\to c_1 \left (\frac {1}{32 x^{3/2}}+\frac {1}{x^{7/2}}+\frac {\sqrt {x}}{1024}\right )+c_2 \left (\frac {x^{13/2}}{10240}-\frac {x^{9/2}}{64}+x^{5/2}\right ) \]