3.9 problem 9

Internal problem ID [1931]

Book: Differential Equations by Alfred L. Nelson, Karl W. Folley, Max Coral. 3rd ed. DC heath. Boston. 1964
Section: Exercise 7, page 28
Problem number: 9.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class C`], _rational, [_Abel, `2nd type`, `class A`]]

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

Solution by Maple

Time used: 0.015 (sec). Leaf size: 35

dsolve((x+2*y(x))+(3*x+6*y(x)+3)*diff(y(x),x)=0,y(x), singsol=all)
 

\[ y = \frac {{\mathrm e}^{-\operatorname {LambertW}\left (-\frac {{\mathrm e}^{-\frac {3}{2}} {\mathrm e}^{-\frac {x}{6}} {\mathrm e}^{\frac {c_{1}}{6}}}{2}\right )-\frac {3}{2}-\frac {x}{6}+\frac {c_{1}}{6}}}{2}-\frac {3}{2}-\frac {x}{2} \]

Solution by Mathematica

Time used: 4.116 (sec). Leaf size: 43

DSolve[(x+2*y[x])+(3*x+6*y[x]+3)*y'[x]==0,y[x],x,IncludeSingularSolutions -> True]
 

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