1.138 problem 139

Internal problem ID [8475]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 139.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_rational, _Riccati]

\[ \boxed {x^{2} \left (y^{\prime }+y^{2}\right )=-a \,x^{k}+b \left (b -1\right )} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 229

dsolve(x^2*(diff(y(x),x)+y(x)^2) + a*x^k - b*(b-1)=0,y(x), singsol=all)
 

\[ y \left (x \right ) = \frac {-x^{\frac {k}{2}} \left (\operatorname {BesselY}\left (\frac {\operatorname {csgn}\left (2 b -1\right ) \left (2 b -1\right )+k}{k}, \frac {2 \sqrt {a}\, x^{\frac {k}{2}}}{k}\right ) c_{1} +\operatorname {BesselJ}\left (\frac {\operatorname {csgn}\left (2 b -1\right ) \left (2 b -1\right )+k}{k}, \frac {2 \sqrt {a}\, x^{\frac {k}{2}}}{k}\right )\right ) \sqrt {a}+\left (\frac {1}{2}+\operatorname {csgn}\left (2 b -1\right ) b -\frac {\operatorname {csgn}\left (2 b -1\right )}{2}\right ) \left (\operatorname {BesselY}\left (\frac {\operatorname {csgn}\left (2 b -1\right ) \left (2 b -1\right )}{k}, \frac {2 \sqrt {a}\, x^{\frac {k}{2}}}{k}\right ) c_{1} +\operatorname {BesselJ}\left (\frac {\operatorname {csgn}\left (2 b -1\right ) \left (2 b -1\right )}{k}, \frac {2 \sqrt {a}\, x^{\frac {k}{2}}}{k}\right )\right )}{x \left (\operatorname {BesselY}\left (\frac {\operatorname {csgn}\left (2 b -1\right ) \left (2 b -1\right )}{k}, \frac {2 \sqrt {a}\, x^{\frac {k}{2}}}{k}\right ) c_{1} +\operatorname {BesselJ}\left (\frac {\operatorname {csgn}\left (2 b -1\right ) \left (2 b -1\right )}{k}, \frac {2 \sqrt {a}\, x^{\frac {k}{2}}}{k}\right )\right )} \]

Solution by Mathematica

Time used: 0.496 (sec). Leaf size: 627

DSolve[x^2*(y'[x]+y[x]^2) + a*x^k - b*(b-1)==0,y[x],x,IncludeSingularSolutions -> True]
                                                                                    
                                                                                    
 

\begin{align*} y(x)\to \frac {\sqrt {a} x^k \operatorname {Gamma}\left (\frac {2 b+k-1}{k}\right ) \operatorname {BesselJ}\left (-\frac {-2 b+k+1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )-\sqrt {a} x^k \operatorname {Gamma}\left (\frac {2 b+k-1}{k}\right ) \operatorname {BesselJ}\left (\frac {2 b+k-1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )+\sqrt {x^k} \operatorname {Gamma}\left (\frac {2 b+k-1}{k}\right ) \operatorname {BesselJ}\left (\frac {2 b-1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )-\sqrt {a} c_1 x^k \operatorname {Gamma}\left (\frac {-2 b+k+1}{k}\right ) \operatorname {BesselJ}\left (\frac {-2 b+k+1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )+\sqrt {a} c_1 x^k \operatorname {Gamma}\left (\frac {-2 b+k+1}{k}\right ) \operatorname {BesselJ}\left (-\frac {2 b+k-1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )+c_1 \sqrt {x^k} \operatorname {Gamma}\left (\frac {-2 b+k+1}{k}\right ) \operatorname {BesselJ}\left (\frac {1-2 b}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )}{2 x \sqrt {x^k} \left (\operatorname {Gamma}\left (\frac {2 b+k-1}{k}\right ) \operatorname {BesselJ}\left (\frac {2 b-1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )+c_1 \operatorname {Gamma}\left (\frac {-2 b+k+1}{k}\right ) \operatorname {BesselJ}\left (\frac {1-2 b}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )\right )} \\ y(x)\to \frac {\frac {\sqrt {a} \sqrt {x^k} \left (\operatorname {BesselJ}\left (-\frac {2 b+k-1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )-\operatorname {BesselJ}\left (\frac {-2 b+k+1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )\right )}{\operatorname {BesselJ}\left (\frac {1-2 b}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )}+1}{2 x} \\ y(x)\to \frac {\frac {\sqrt {a} \sqrt {x^k} \left (\operatorname {BesselJ}\left (-\frac {2 b+k-1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )-\operatorname {BesselJ}\left (\frac {-2 b+k+1}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )\right )}{\operatorname {BesselJ}\left (\frac {1-2 b}{k},\frac {2 \sqrt {a} \sqrt {x^k}}{k}\right )}+1}{2 x} \\ \end{align*}