2.49 problem 625

Internal problem ID [8960]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, Additional non-linear first order
Problem number: 625.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_1st_order, `_with_symmetry_[F(x),G(y)]`]]

\[ \boxed {y^{\prime }-\frac {i x^{2} \left (i-2 \sqrt {-x^{3}+6 y}\right )}{2}=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 55

dsolve(diff(y(x),x) = 1/2*I*x^2*(I-2*(-x^3+6*y(x))^(1/2)),y(x), singsol=all)
 

\[ i \ln \left (x^{3}-6 y \left (x \right )-1\right )+2 \sqrt {-x^{3}+6 y \left (x \right )}-2 \arctan \left (\sqrt {-x^{3}+6 y \left (x \right )}\right )+2 i x^{3}-c_{1} = 0 \]

Solution by Mathematica

Time used: 11.298 (sec). Leaf size: 69

DSolve[y'[x] == (I/2)*x^2*(I - 2*Sqrt[-x^3 + 6*y[x]]),y[x],x,IncludeSingularSolutions -> True]
                                                                                    
                                                                                    
 

\begin{align*} y(x)\to \frac {1}{6} \left (-W\left (-i e^{-x^3-1-6 c_1}\right ){}^2-2 W\left (-i e^{-x^3-1-6 c_1}\right )+x^3-1\right ) \\ y(x)\to \frac {1}{6} \left (x^3-1\right ) \\ \end{align*}