44.4.18 problem 5 (b)

Internal problem ID [7031]
Book : A First Course in Differential Equations with Modeling Applications by Dennis G. Zill. 12 ed. Metric version. 2024. Cengage learning.
Section : Chapter 2. First order differential equations. Section 2.1 Solution curves without a solution. Exercises 2.1 at page 44
Problem number : 5 (b)
Date solved : Wednesday, March 05, 2025 at 04:03:06 AM
CAS classification : [_quadrature]

\begin{align*} y^{\prime }&=x \end{align*}

With initial conditions

\begin{align*} y \left (0\right )&=-3 \end{align*}

✓ Maple. Time used: 0.006 (sec). Leaf size: 11

ode:=diff(y(x),x) = x; 
ic:=y(0) = -3; 
dsolve([ode,ic],y(x), singsol=all);
 

\[ y = \frac {x^{2}}{2}-3 \]

✓ Mathematica. Time used: 0.002 (sec). Leaf size: 14

ode=D[y[x],x]==x; 
ic={y[0]==-3}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to \frac {1}{2} \left (x^2-6\right ) \]

✓ Sympy. Time used: 0.090 (sec). Leaf size: 8

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

\[ y{\left (x \right )} = \frac {x^{2}}{2} - 3 \]