5.32 problem 29

Internal problem ID [1006]

Book: Elementary differential equations with boundary value problems. William F. Trench. Brooks/Cole 2001
Section: Chapter 2, First order equations. Transformation of Nonlinear Equations into Separable Equations. Section 2.4 Page 68
Problem number: 29.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class A`]]

\[ \boxed {\left (y^{\prime } x -y\right ) \left (\ln \left (y\right )-\ln \left (x \right )\right )-x=0} \]

Solution by Maple

Time used: 0.062 (sec). Leaf size: 19

dsolve((diff(y(x),x)*x-y(x))*(ln(y(x))-ln(x))=x,y(x), singsol=all)
 

\[ y \left (x \right ) = {\mathrm e}^{\operatorname {LambertW}\left (\ln \left (c_{1} x \right ) {\mathrm e}^{-1}\right )+1} x \]

Solution by Mathematica

Time used: 60.156 (sec). Leaf size: 21

DSolve[(y'[x]*x-y[x])*(Log[y[x]]-Log[x])==x,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to x e^{1+W\left (\frac {\log (x)+c_1}{e}\right )} \\ \end{align*}