1.109 problem 109

Internal problem ID [7689]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 109.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_Bernoulli]

\[ \boxed {y^{\prime } x -y \left (2 y \ln \left (x \right )-1\right )=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 15

dsolve(x*diff(y(x),x) - y(x)*(2*y(x)*ln(x)-1)=0,y(x), singsol=all)
 

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

Solution by Mathematica

Time used: 0.154 (sec). Leaf size: 22

DSolve[x*y'[x] - y[x]*(2*y[x]*Log[x]-1)==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to \frac {1}{2 \log (x)+c_1 x+2} \\ y(x)\to 0 \\ \end{align*}