Internal problem ID [5724]
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. Problems for review and discovert.
(A) Drill Exercises . Page 194
Problem number: 1(b).
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
Solve \begin {gather*} \boxed {y^{\prime \prime }-x y^{\prime }+y-x=0} \end {gather*} With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.001 (sec). Leaf size: 35
Order:=8; dsolve(diff(y(x),x$2)-x*diff(y(x),x)+y(x)=x,y(x),type='series',x=0);
\[ y \relax (x ) = \left (1-\frac {1}{2} x^{2}-\frac {1}{24} x^{4}-\frac {1}{240} x^{6}\right ) y \relax (0)+D\relax (y )\relax (0) x +\frac {x^{3}}{6}+\frac {x^{5}}{60}+\frac {x^{7}}{630}+O\left (x^{8}\right ) \]
✓ Solution by Mathematica
Time used: 0.019 (sec). Leaf size: 55
AsymptoticDSolveValue[y''[x]-x*y'[x]+y[x]==x,y[x],{x,0,7}]
\[ y(x)\to \frac {x^7}{630}+\frac {x^5}{60}+\frac {x^3}{6}+c_1 \left (-\frac {x^6}{240}-\frac {x^4}{24}-\frac {x^2}{2}+1\right )+c_2 x \]