1.461 problem 463

Internal problem ID [8798]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 463.
ODE order: 1.
ODE degree: 2.

CAS Maple gives this as type [[_1st_order, _with_linear_symmetries]]

\[ \boxed {y {y^{\prime }}^{2}={\mathrm e}^{2 x}} \]

Solution by Maple

Time used: 0.187 (sec). Leaf size: 67

dsolve(y(x)*diff(y(x),x)^2-exp(2*x) = 0,y(x), singsol=all)
 

\begin{align*} \frac {2 y \left (x \right )^{2}+3 c_{1} \sqrt {y \left (x \right )}-3 \sqrt {y \left (x \right ) {\mathrm e}^{2 x}}}{3 \sqrt {y \left (x \right )}} &= 0 \\ \frac {2 y \left (x \right )^{2}+3 c_{1} \sqrt {y \left (x \right )}+3 \sqrt {y \left (x \right ) {\mathrm e}^{2 x}}}{3 \sqrt {y \left (x \right )}} &= 0 \\ \end{align*}

Solution by Mathematica

Time used: 2.026 (sec). Leaf size: 47

DSolve[-E^(2*x) + y[x]*y'[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
                                                                                    
                                                                                    
 

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