5.6 problem 105

Internal problem ID [15012]

Book: A book of problems in ordinary differential equations. M.L. KRASNOV, A.L. KISELYOV, G.I. MARKARENKO. MIR, MOSCOW. 1983
Section: Section 5. Homogeneous equations. Exercises page 44
Problem number: 105.
ODE order: 1.
ODE degree: 1.

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

\[ \boxed {2 x^{2} y^{\prime }-y^{2}=x^{2}} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 17

dsolve(2*x^2*diff(y(x),x)=x^2+y(x)^2,y(x), singsol=all)
 

\[ y = \frac {x \left (\ln \left (x \right )+c_{1} -2\right )}{\ln \left (x \right )+c_{1}} \]

Solution by Mathematica

Time used: 0.122 (sec). Leaf size: 29

DSolve[2*x^2*y'[x]==x^2+y[x]^2,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to \frac {x (\log (x)-2+2 c_1)}{\log (x)+2 c_1} \\ y(x)\to x \\ \end{align*}