84.14.13 problem 7.21

Internal problem ID [22170]
Book : Schaums outline series. Differential Equations By Richard Bronson. 1973. McGraw-Hill Inc. ISBN 0-07-008009-7
Section : Chapter 7. Integrating factors. Supplementary problems
Problem number : 7.21
Date solved : Thursday, October 02, 2025 at 08:33:17 PM
CAS classification : [[_homogeneous, `class D`], _rational, _Riccati]

\begin{align*} y+x^{3}+x y^{2}-x y^{\prime }&=0 \end{align*}

✓ Maple. Time used: 0.003 (sec). Leaf size: 14

ode:=y(x)+x^3+x*y(x)^2-x*diff(y(x),x) = 0; 
dsolve(ode,y(x), singsol=all);
 

\[ y = \tan \left (\frac {x^{2}}{2}+c_1 \right ) x \]

✓ Mathematica. Time used: 0.12 (sec). Leaf size: 18

ode=(y[x]+x^3+x*y[x]^2)-x*D[y[x],x]==0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)&\to x \tan \left (\frac {x^2}{2}+c_1\right ) \end{align*}

✓ Sympy. Time used: 0.189 (sec). Leaf size: 24

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(x**3 + x*y(x)**2 - x*Derivative(y(x), x) + y(x),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = \frac {x \left (i C_{1} + i e^{i x^{2}}\right )}{C_{1} - e^{i x^{2}}} \]