1.43 problem 43

Internal problem ID [8380]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 43.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_Abel]

\[ \boxed {y^{\prime }+\left (4 a^{2} x +3 a \,x^{2}+b \right ) y^{3}+3 y^{2} x=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 384

dsolve(diff(y(x),x) + (3*a*x^2 + 4*a^2*x + b)*y(x)^3 + 3*x*y(x)^2=0,y(x), singsol=all)
 

\[ c_{1} +\frac {-\left (\frac {\sqrt {\frac {4 a^{3}-3 b}{a^{3}}}}{2}-\frac {2 a +3 x}{2 a}\right ) \operatorname {BesselK}\left (\frac {\sqrt {\frac {4 a^{3}-3 b}{a^{3}}}}{2}, -\frac {\sqrt {3}\, \sqrt {\frac {4 a^{2} x y \left (x \right )+3 x^{2} a y \left (x \right )+b y \left (x \right )-2 a}{a^{3} y \left (x \right )}}}{2}\right )-\frac {\operatorname {BesselK}\left (1+\frac {\sqrt {\frac {4 a^{3}-3 b}{a^{3}}}}{2}, -\frac {\sqrt {3}\, \sqrt {\frac {4 a^{2} x y \left (x \right )+3 x^{2} a y \left (x \right )+b y \left (x \right )-2 a}{a^{3} y \left (x \right )}}}{2}\right ) \sqrt {3}\, \sqrt {\frac {4 a^{2} x y \left (x \right )+3 x^{2} a y \left (x \right )+b y \left (x \right )-2 a}{a^{3} y \left (x \right )}}}{2}}{-\left (\frac {\sqrt {\frac {4 a^{3}-3 b}{a^{3}}}}{2}-\frac {2 a +3 x}{2 a}\right ) \operatorname {BesselI}\left (\frac {\sqrt {\frac {4 a^{3}-3 b}{a^{3}}}}{2}, -\frac {\sqrt {3}\, \sqrt {\frac {4 a^{2} x y \left (x \right )+3 x^{2} a y \left (x \right )+b y \left (x \right )-2 a}{a^{3} y \left (x \right )}}}{2}\right )+\frac {\operatorname {BesselI}\left (1+\frac {\sqrt {\frac {4 a^{3}-3 b}{a^{3}}}}{2}, -\frac {\sqrt {3}\, \sqrt {\frac {4 a^{2} x y \left (x \right )+3 x^{2} a y \left (x \right )+b y \left (x \right )-2 a}{a^{3} y \left (x \right )}}}{2}\right ) \sqrt {3}\, \sqrt {\frac {4 a^{2} x y \left (x \right )+3 x^{2} a y \left (x \right )+b y \left (x \right )-2 a}{a^{3} y \left (x \right )}}}{2}} = 0 \]

Solution by Mathematica

Time used: 4.252 (sec). Leaf size: 490

DSolve[y'[x] + (3*a*x^2 + 4*a^2*x + b)*y[x]^3 + 3*x*y[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
 

\[ \text {Solve}\left [c_1=-\frac {i \sqrt {-\frac {4 a^3-3 b}{4 a^3}-\frac {3}{2 a^2 y(x)}+\frac {(-2 a-3 x)^2}{4 a^2}} \operatorname {BesselJ}\left (\frac {1}{2} \sqrt {\frac {4 a^3-3 b}{a^3}}+1,-i \sqrt {\frac {(-2 a-3 x)^2}{4 a^2}-\frac {4 a^3-3 b}{4 a^3}-\frac {3}{2 a^2 y(x)}}\right )+\left (\frac {1}{2} \sqrt {\frac {4 a^3-3 b}{a^3}}+\frac {-2 a-3 x}{2 a}\right ) \operatorname {BesselJ}\left (\frac {1}{2} \sqrt {\frac {4 a^3-3 b}{a^3}},-i \sqrt {\frac {(-2 a-3 x)^2}{4 a^2}-\frac {4 a^3-3 b}{4 a^3}-\frac {3}{2 a^2 y(x)}}\right )}{i \sqrt {-\frac {4 a^3-3 b}{4 a^3}-\frac {3}{2 a^2 y(x)}+\frac {(-2 a-3 x)^2}{4 a^2}} \operatorname {BesselY}\left (\frac {1}{2} \sqrt {\frac {4 a^3-3 b}{a^3}}+1,-i \sqrt {\frac {(-2 a-3 x)^2}{4 a^2}-\frac {4 a^3-3 b}{4 a^3}-\frac {3}{2 a^2 y(x)}}\right )+\left (\frac {1}{2} \sqrt {\frac {4 a^3-3 b}{a^3}}+\frac {-2 a-3 x}{2 a}\right ) \operatorname {BesselY}\left (\frac {1}{2} \sqrt {\frac {4 a^3-3 b}{a^3}},-i \sqrt {\frac {(-2 a-3 x)^2}{4 a^2}-\frac {4 a^3-3 b}{4 a^3}-\frac {3}{2 a^2 y(x)}}\right )},y(x)\right ] \]