Internal problem ID [5699]
Book: Differential Equations: Theory, Technique, and Practice by George Simmons, Steven Krantz.
McGraw-Hill NY. 2007. 1st Edition.
Section: Chapter 4. Power Series Solutions and Special Functions. Section 4.4. REGULAR SINGULAR
POINTS. Page 175
Problem number: 3(c).
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_Emden, _Fowler]]
Solve \begin {gather*} \boxed {x^{2} y^{\prime \prime }+3 x y^{\prime }+4 y x=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.062 (sec). Leaf size: 74
Order:=8; dsolve(x^2*diff(y(x),x$2)+3*x*diff(y(x),x)+4*x*y(x)=0,y(x),type='series',x=0);
\[ y \relax (x ) = \frac {c_{1} \left (1-\frac {4}{3} x +\frac {2}{3} x^{2}-\frac {8}{45} x^{3}+\frac {4}{135} x^{4}-\frac {16}{4725} x^{5}+\frac {4}{14175} x^{6}-\frac {16}{893025} x^{7}+\mathrm {O}\left (x^{8}\right )\right ) x^{2}+c_{2} \left (\ln \relax (x ) \left (16 x^{2}-\frac {64}{3} x^{3}+\frac {32}{3} x^{4}-\frac {128}{45} x^{5}+\frac {64}{135} x^{6}-\frac {256}{4725} x^{7}+\mathrm {O}\left (x^{8}\right )\right )+\left (-2-8 x +\frac {256}{9} x^{3}-\frac {200}{9} x^{4}+\frac {5024}{675} x^{5}-\frac {2912}{2025} x^{6}+\frac {90752}{496125} x^{7}+\mathrm {O}\left (x^{8}\right )\right )\right )}{x^{2}} \]
✓ Solution by Mathematica
Time used: 0.065 (sec). Leaf size: 116
AsymptoticDSolveValue[x^2*y''[x]+3*x*y'[x]+4*x*y[x]==0,y[x],{x,0,7}]
\[ y(x)\to c_2 \left (\frac {4 x^6}{14175}-\frac {16 x^5}{4725}+\frac {4 x^4}{135}-\frac {8 x^3}{45}+\frac {2 x^2}{3}-\frac {4 x}{3}+1\right )+c_1 \left (\frac {1696 x^6-8976 x^5+27900 x^4-39600 x^3+8100 x^2+8100 x+2025}{2025 x^2}-\frac {8}{135} \left (4 x^4-24 x^3+90 x^2-180 x+135\right ) \log (x)\right ) \]