Internal problem ID [13965]
Book: Ordinary Differential Equations. An introduction to the fundamentals. Kenneth B. Howell.
second edition. CRC Press. FL, USA. 2020
Section: Chapter 34. Power series solutions II: Generalization and theory. Additional Exercises.
page 678
Problem number: 34.8 b(i).
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_separable]
\[ \boxed {y^{\prime }-y \,{\mathrm e}^{x}=0} \] With the expansion point for the power series method at \(x = 0\).
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 52
Order:=10; dsolve(diff(y(x),x)-exp(x)*y(x)=0,y(x),type='series',x=0);
\[ y \left (x \right ) = \left (1+x +x^{2}+\frac {5}{6} x^{3}+\frac {5}{8} x^{4}+\frac {13}{30} x^{5}+\frac {203}{720} x^{6}+\frac {877}{5040} x^{7}+\frac {23}{224} x^{8}+\frac {1007}{17280} x^{9}\right ) y \left (0\right )+O\left (x^{10}\right ) \]
✓ Solution by Mathematica
Time used: 0.001 (sec). Leaf size: 61
AsymptoticDSolveValue[y'[x]-Exp[x]*y[x]==0,y[x],{x,0,9}]
\[ y(x)\to c_1 \left (\frac {1007 x^9}{17280}+\frac {23 x^8}{224}+\frac {877 x^7}{5040}+\frac {203 x^6}{720}+\frac {13 x^5}{30}+\frac {5 x^4}{8}+\frac {5 x^3}{6}+x^2+x+1\right ) \]