4.1 problem 22

Internal problem ID [10440]

Book: Handbook of exact solutions for ordinary differential equations. By Polyanin and Zaitsev. Second edition
Section: Chapter 1, section 1.2. Riccati Equation. subsection 1.2.3-2. Equations with power and exponential functions
Problem number: 22.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_Riccati]

\[ \boxed {y^{\prime }-y^{2}-a x \,{\mathrm e}^{\lambda x} y={\mathrm e}^{\lambda x} a} \]

Solution by Maple

Time used: 0.032 (sec). Leaf size: 76

dsolve(diff(y(x),x)=y(x)^2+a*x*exp(lambda*x)*y(x)+a*exp(lambda*x),y(x), singsol=all)
 

\[ y \left (x \right ) = \frac {{\mathrm e}^{\frac {a x \,{\mathrm e}^{\lambda x}}{\lambda }-\frac {a \,{\mathrm e}^{\lambda x}}{\lambda ^{2}}}}{x^{2} \lambda ^{2} \left (c_{1} -\left (\int \frac {{\mathrm e}^{\frac {a x \,{\mathrm e}^{\lambda x}}{\lambda }-\frac {a \,{\mathrm e}^{\lambda x}}{\lambda ^{2}}}}{x^{2} \lambda ^{2}}d x \right )\right )}-\frac {1}{x} \]

Solution by Mathematica

Time used: 2.132 (sec). Leaf size: 110

DSolve[y'[x]==y[x]^2+a*x*Exp[\[Lambda]*x]*y[x]+a*Exp[\[Lambda]*x],y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to -\frac {x \int _1^x\frac {e^{\frac {a e^{\lambda K[1]} (\lambda K[1]-1)}{\lambda ^2}}}{K[1]^2}dK[1]+e^{\frac {a e^{\lambda x} (\lambda x-1)}{\lambda ^2}}+c_1 x}{x^2 \left (\int _1^x\frac {e^{\frac {a e^{\lambda K[1]} (\lambda K[1]-1)}{\lambda ^2}}}{K[1]^2}dK[1]+c_1\right )} y(x)\to -\frac {1}{x} \end{align*}