Internal problem ID [9238]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 6, non-linear second order
Problem number: 1660 (book 6.69).
ODE order: 2.
ODE degree: -1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
Solve \begin {gather*} \boxed {y^{\prime \prime }-y f \left (x , \frac {y^{\prime }}{y}\right )=0} \end {gather*}
✗ Solution by Maple
dsolve(diff(diff(y(x),x),x)-y(x)*f(x,diff(y(x),x)/y(x))=0,y(x), singsol=all)
\[ \text {No solution found} \]
✗ Solution by Mathematica
Time used: 0.0 (sec). Leaf size: 0
DSolve[-(f[x, y'[x]/y[x]]*y[x]) + y''[x] == 0,y[x],x,IncludeSingularSolutions -> True]
Not solved