Internal problem ID [1312]
Book: Elementary differential equations with boundary value problems. William F. Trench.
Brooks/Cole 2001
Section: Chapter 7 Series Solutions of Linear Second Equations. 7.5 THE METHOD OF FROBENIUS
I. Exercises 7.5. Page 358
Problem number: 21.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
Solve \begin {gather*} \boxed {2 x^{2} \left (x +3\right ) y^{\prime \prime }+x \left (5 x +1\right ) y^{\prime }+\left (x +1\right ) y=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.013 (sec). Leaf size: 47
Order:=6; dsolve(2*x^2*(3+x)*diff(y(x),x$2)+x*(1+5*x)*diff(y(x),x)+(1+x)*y(x)=0,y(x),type='series',x=0);
\[ y \relax (x ) = c_{1} x^{\frac {1}{3}} \left (1-\frac {4}{9} x +\frac {14}{81} x^{2}-\frac {140}{2187} x^{3}+\frac {455}{19683} x^{4}-\frac {1456}{177147} x^{5}+\mathrm {O}\left (x^{6}\right )\right )+c_{2} \sqrt {x}\, \left (1-\frac {3}{7} x +\frac {15}{91} x^{2}-\frac {15}{247} x^{3}+\frac {27}{1235} x^{4}-\frac {297}{38285} x^{5}+\mathrm {O}\left (x^{6}\right )\right ) \]
✓ Solution by Mathematica
Time used: 0.006 (sec). Leaf size: 90
AsymptoticDSolveValue[2*x^2*(3+x)*y''[x]+x*(1+5*x)*y'[x]+(1+x)*y[x]==0,y[x],{x,0,5}]
\[ y(x)\to c_1 \sqrt {x} \left (-\frac {297 x^5}{38285}+\frac {27 x^4}{1235}-\frac {15 x^3}{247}+\frac {15 x^2}{91}-\frac {3 x}{7}+1\right )+c_2 \sqrt [3]{x} \left (-\frac {1456 x^5}{177147}+\frac {455 x^4}{19683}-\frac {140 x^3}{2187}+\frac {14 x^2}{81}-\frac {4 x}{9}+1\right ) \]