Internal problem ID [9299]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 6, non-linear second order
Problem number: 1720.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _missing_x]]
Solve \begin {gather*} \boxed {y^{\prime \prime } y+a \left (y^{\prime }\right )^{2}+b y^{2} y^{\prime }+c y^{4}=0} \end {gather*}
✓ Solution by Maple
Time used: 0.071 (sec). Leaf size: 178
dsolve(diff(diff(y(x),x),x)*y(x)+a*diff(y(x),x)^2+b*y(x)^2*diff(y(x),x)+c*y(x)^4=0,y(x), singsol=all)
\begin{align*} y \relax (x ) = 0 \\ \int _{}^{y \relax (x )}\frac {2 a +4}{\tan \left (\RootOf \left (2 \textit {\_Z} b \,\textit {\_a}^{2}-2 \ln \left (\textit {\_a} \right ) a \sqrt {\textit {\_a}^{4} \left (4 c a -b^{2}+8 c \right )}-\ln \left (\frac {\textit {\_a}^{4} \left (4 a c \left (\tan ^{2}\left (\textit {\_Z} \right )\right )-b^{2} \left (\tan ^{2}\left (\textit {\_Z} \right )\right )+8 c \left (\tan ^{2}\left (\textit {\_Z} \right )\right )+4 c a -b^{2}+8 c \right )}{4 a +8}\right ) \sqrt {\textit {\_a}^{4} \left (4 c a -b^{2}+8 c \right )}+c_{1} \sqrt {\textit {\_a}^{4} \left (4 c a -b^{2}+8 c \right )}\right )\right ) \sqrt {\textit {\_a}^{4} \left (4 c a -b^{2}+8 c \right )}-b \,\textit {\_a}^{2}}d \textit {\_a} -x -c_{2} = 0 \\ \end{align*}
✓ Solution by Mathematica
Time used: 54.883 (sec). Leaf size: 105
DSolve[c*y[x]^4 + b*y[x]^2*y'[x] + a*y'[x]^2 + y[x]*y''[x] == 0,y[x],x,IncludeSingularSolutions -> True]
\[ \text {Solve}\left [\int _1^{y(x)}\frac {1}{K[2]^2 \text {InverseFunction}\left [\frac {\log (c+\text {$\#$1} (b+(a+2) \text {$\#$1}))-\frac {2 b \text {ArcTan}\left (\frac {b+2 (a+2) \text {$\#$1}}{\sqrt {4 (a+2) c-b^2}}\right )}{\sqrt {4 (a+2) c-b^2}}}{2 (a+2)}\&\right ][c_1-\log (K[2])]}dK[2]=x-c_2,y(x)\right ] \]