21.15 problem 5(c)

Internal problem ID [5324]

Book: An introduction to Ordinary Differential Equations. Earl A. Coddington. Dover. NY 1961
Section: Chapter 5. Existence and uniqueness of solutions to first order equations. Page 190
Problem number: 5(c).
ODE order: 1.
ODE degree: 1.

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

Solve \begin {gather*} \boxed {y^{\prime }-\frac {y+x +1}{2 x +2 y-1}=0} \end {gather*}

Solution by Maple

Time used: 0.03 (sec). Leaf size: 29

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

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

Solution by Mathematica

Time used: 0.019 (sec). Leaf size: 25

DSolve[y'[x]==(x+y[x]+1)/(2*x+2*y[x]-1),y[x],x,IncludeSingularSolutions -> True]
 

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