Internal problem ID [8180]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, Additional non-linear first order
Problem number: 600.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [[_1st_order, _with_symmetry_[F(x),G(y)]]]
Solve \begin {gather*} \boxed {y^{\prime }-\frac {F \left (-\frac {2 y \ln \relax (x )-1}{y}\right ) y^{2}}{x}=0} \end {gather*}
✓ Solution by Maple
Time used: 0.093 (sec). Leaf size: 53
dsolve(diff(y(x),x) = F(-(-1+2*y(x)*ln(x))/y(x))*y(x)^2/x,y(x), singsol=all)
\begin{align*} y \relax (x ) = \frac {1}{2 \ln \relax (x )+\RootOf \left (F \left (\textit {\_Z} \right )+2\right )} \\ \int _{\textit {\_b}}^{y \relax (x )}\frac {1}{\left (F \left (\frac {1-2 \textit {\_a} \ln \relax (x )}{\textit {\_a}}\right )+2\right ) \textit {\_a}^{2}}d \textit {\_a} -\ln \relax (x )-c_{1} = 0 \\ \end{align*}
✓ Solution by Mathematica
Time used: 0.221 (sec). Leaf size: 246
DSolve[y'[x] == (F[(1 - 2*Log[x]*y[x])/y[x]]*y[x]^2)/x,y[x],x,IncludeSingularSolutions -> True]
\[ \text {Solve}\left [\int _1^{y(x)}\left (-\int _1^x\left (\frac {2 \left (-\frac {2 \log (K[1])}{K[2]}-\frac {1-2 K[2] \log (K[1])}{K[2]^2}\right ) F'\left (\frac {1-2 K[2] \log (K[1])}{K[2]}\right )}{\left (F\left (\frac {1-2 K[2] \log (K[1])}{K[2]}\right )+2\right ) K[1]}-\frac {2 F\left (\frac {1-2 K[2] \log (K[1])}{K[2]}\right ) \left (-\frac {2 \log (K[1])}{K[2]}-\frac {1-2 K[2] \log (K[1])}{K[2]^2}\right ) F'\left (\frac {1-2 K[2] \log (K[1])}{K[2]}\right )}{\left (F\left (\frac {1-2 K[2] \log (K[1])}{K[2]}\right )+2\right )^2 K[1]}\right )dK[1]-\frac {2}{\left (F\left (\frac {1-2 K[2] \log (x)}{K[2]}\right )+2\right ) K[2]^2}\right )dK[2]+\int _1^x\frac {2 F\left (\frac {1-2 \log (K[1]) y(x)}{y(x)}\right )}{\left (F\left (\frac {1-2 \log (K[1]) y(x)}{y(x)}\right )+2\right ) K[1]}dK[1]=c_1,y(x)\right ] \]