11.9 problem 268

Internal problem ID [15130]

Book: A book of problems in ordinary differential equations. M.L. KRASNOV, A.L. KISELYOV, G.I. MARKARENKO. MIR, MOSCOW. 1983
Section: Section 11. Singular solutions of differential equations. Exercises page 92
Problem number: 268.
ODE order: 1.
ODE degree: 2.

CAS Maple gives this as type [_quadrature]

\[ \boxed {\left (y^{\prime }-1\right )^{2}-y^{2}=0} \]

Solution by Maple

Time used: 0.016 (sec). Leaf size: 21

dsolve((diff(y(x),x)-1)^2=y(x)^2,y(x), singsol=all)
 

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

Solution by Mathematica

Time used: 0.074 (sec). Leaf size: 37

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

\begin{align*} y(x)\to 1+c_1 e^{-x} \\ y(x)\to -1+c_1 e^x \\ y(x)\to -1 \\ y(x)\to 1 \\ \end{align*}