Internal problem ID [2327]
Book: Differential Equations by Alfred L. Nelson, Karl W. Folley, Max Coral. 3rd ed. DC heath.
Boston. 1964
Section: Exercise 37, page 171
Problem number: 14.
ODE order: 1.
ODE degree: 2.
CAS Maple gives this as type [[_homogeneous, `class A`], _rational, _dAlembert]
\[ \boxed {y {y^{\prime }}^{2}-2 y^{\prime } x +y=0} \]
✓ Solution by Maple
Time used: 0.047 (sec). Leaf size: 75
dsolve(y(x)*diff(y(x),x)^2-2*x*diff(y(x),x)+y(x)=0,y(x), singsol=all)
\begin{align*} y \left (x \right ) = -x y \left (x \right ) = x y \left (x \right ) = 0 y \left (x \right ) = \sqrt {-2 c_{1} x i+c_{1}^{2}} y \left (x \right ) = \sqrt {2 c_{1} x i+c_{1}^{2}} y \left (x \right ) = -\sqrt {-2 c_{1} x i+c_{1}^{2}} y \left (x \right ) = -\sqrt {2 c_{1} x i+c_{1}^{2}} \end{align*}
✓ Solution by Mathematica
Time used: 2.388 (sec). Leaf size: 174
DSolve[y[x]*y'[x]^2-2*x*y'[x]+y[x]==0,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to -\frac {1}{4} \left (\cosh \left (\frac {c_1}{2}\right )+\sinh \left (\frac {c_1}{2}\right )\right ) \sqrt {-8 i x+\cosh (c_1)+\sinh (c_1)} y(x)\to \frac {1}{4} \left (\cosh \left (\frac {c_1}{2}\right )+\sinh \left (\frac {c_1}{2}\right )\right ) \sqrt {-8 i x+\cosh (c_1)+\sinh (c_1)} y(x)\to -\frac {1}{4} \left (\cosh \left (\frac {c_1}{2}\right )+\sinh \left (\frac {c_1}{2}\right )\right ) \sqrt {8 i x+\cosh (c_1)+\sinh (c_1)} y(x)\to \frac {1}{4} \left (\cosh \left (\frac {c_1}{2}\right )+\sinh \left (\frac {c_1}{2}\right )\right ) \sqrt {8 i x+\cosh (c_1)+\sinh (c_1)} y(x)\to 0 y(x)\to -x y(x)\to x \end{align*}