Internal problem ID [9179]
Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 6, non-linear second order
Problem number: 1600 (6.10).
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]
Solve \begin {gather*} \boxed {y^{\prime \prime }+d +y^{2} b +c y+a y^{3}=0} \end {gather*}
✓ Solution by Maple
Time used: 0.031 (sec). Leaf size: 89
dsolve(diff(diff(y(x),x),x)+d+y(x)^2*b+c*y(x)+a*y(x)^3=0,y(x), singsol=all)
\begin{align*} \int _{}^{y \relax (x )}-\frac {6}{\sqrt {-18 a \,\textit {\_a}^{4}-24 b \,\textit {\_a}^{3}-36 c \,\textit {\_a}^{2}-72 d \textit {\_a} +36 c_{1}}}d \textit {\_a} -x -c_{2} = 0 \\ \int _{}^{y \relax (x )}\frac {6}{\sqrt {-18 a \,\textit {\_a}^{4}-24 b \,\textit {\_a}^{3}-36 c \,\textit {\_a}^{2}-72 d \textit {\_a} +36 c_{1}}}d \textit {\_a} -x -c_{2} = 0 \\ \end{align*}
✓ Solution by Mathematica
Time used: 1.278 (sec). Leaf size: 1017
DSolve[d + c*y[x] + b*y[x]^2 + a*y[x]^3 + y''[x] == 0,y[x],x,IncludeSingularSolutions -> True]
\[ \text {Solve}\left [\frac {4 F\left (\text {ArcSin}\left (\sqrt {\frac {\left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,4\right ]\right ) \left (y(x)-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]\right )}{\left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,4\right ]\right ) \left (y(x)-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]\right )}}\right )|\frac {\left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,3\right ]\right ) \left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,4\right ]\right )}{\left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,3\right ]\right ) \left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,4\right ]\right )}\right ){}^2 \left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]\right ){}^2 \left (y(x)-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]\right ) \left (y(x)-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]\right ) \left (y(x)-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,3\right ]\right ) \left (y(x)-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,4\right ]\right )}{\left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]\right ){}^2 \left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,1\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,3\right ]\right ) \left (\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,2\right ]-\text {Root}\left [3 a \text {$\#$1}^4+4 b \text {$\#$1}^3+6 c \text {$\#$1}^2+12 d \text {$\#$1}-6 c_1\&,4\right ]\right ) \left (-\frac {1}{2} a y(x)^4-\frac {2}{3} b y(x)^3-c y(x)^2-2 d y(x)+c_1\right )}=(x+c_2){}^2,y(x)\right ] \]