60.2.204 problem 780

Internal problem ID [10778]
Book : Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section : Chapter 1, Additional non-linear first order
Problem number : 780
Date solved : Sunday, March 30, 2025 at 06:36:49 PM
CAS classification : [[_1st_order, `_with_symmetry_[F(x),G(x)*y+H(x)]`]]

\begin{align*} y^{\prime }&=\frac {x y+y+x \sqrt {y^{2}+x^{2}}}{x \left (x +1\right )} \end{align*}

✓ Maple. Time used: 0.480 (sec). Leaf size: 32

ode:=diff(y(x),x) = (x*y(x)+y(x)+x*(x^2+y(x)^2)^(1/2))/x/(1+x); 
dsolve(ode,y(x), singsol=all);
 

\[ \frac {\sqrt {y^{2}+x^{2}}+y+\left (x^{2}+x \right ) c_{1}}{x \left (x +1\right )} = 0 \]

✓ Mathematica. Time used: 0.297 (sec). Leaf size: 15

ode=D[y[x],x] == (y[x] + x*y[x] + x*Sqrt[x^2 + y[x]^2])/(x*(1 + x)); 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to x \sinh (\log (x+1)+c_1) \]

✗ Sympy

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(Derivative(y(x), x) - (x*sqrt(x**2 + y(x)**2) + x*y(x) + y(x))/(x*(x + 1)),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

Timed Out