Internal problem ID [1373]
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 II. Exercises 7.6. Page 374
Problem number: 21.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _exact, _linear, _homogeneous]]
\[ \boxed {x^{2} \left (1+2 x \right ) y^{\prime \prime }+x \left (3+5 x \right ) y^{\prime }+\left (1-2 x \right ) y=0} \] With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.032 (sec). Leaf size: 69
Order:=6; dsolve(x^2*(1+2*x)*diff(y(x),x$2)+x*(3+5*x)*diff(y(x),x)+(1-2*x)*y(x)=0,y(x),type='series',x=0);
\[ y \left (x \right ) = \frac {\left (c_{2} \ln \left (x \right )+c_{1} \right ) \left (1+3 x +\frac {3}{2} x^{2}-\frac {1}{2} x^{3}+\frac {3}{8} x^{4}-\frac {3}{8} x^{5}+\operatorname {O}\left (x^{6}\right )\right )+\left (\left (-5\right ) x -\frac {25}{4} x^{2}+\frac {5}{4} x^{3}-\frac {25}{32} x^{4}+\frac {113}{160} x^{5}+\operatorname {O}\left (x^{6}\right )\right ) c_{2}}{x} \]
✓ Solution by Mathematica
Time used: 0.007 (sec). Leaf size: 122
AsymptoticDSolveValue[x^2*(1+2*x)*y''[x]+x*(3+5*x)*y'[x]+(1-2*x)*y[x]==0,y[x],{x,0,5}]
\[ y(x)\to \frac {c_1 \left (-\frac {3 x^5}{8}+\frac {3 x^4}{8}-\frac {x^3}{2}+\frac {3 x^2}{2}+3 x+1\right )}{x}+c_2 \left (\frac {\frac {113 x^5}{160}-\frac {25 x^4}{32}+\frac {5 x^3}{4}-\frac {25 x^2}{4}-5 x}{x}+\frac {\left (-\frac {3 x^5}{8}+\frac {3 x^4}{8}-\frac {x^3}{2}+\frac {3 x^2}{2}+3 x+1\right ) \log (x)}{x}\right ) \]