7.1.4 problem 4

Internal problem ID [4]
Book : Elementary Differential Equations. By C. Henry Edwards, David E. Penney and David Calvis. 6th edition. 2008
Section : Chapter 1. First order differential equations. Section 1.2. Problems at page 17
Problem number : 4
Date solved : Saturday, March 29, 2025 at 04:25:26 PM
CAS classification : [_quadrature]

\begin{align*} y^{\prime }&=\frac {1}{x^{2}} \end{align*}

With initial conditions

\begin{align*} y \left (1\right )&=5 \end{align*}

✓ Maple. Time used: 0.023 (sec). Leaf size: 11

ode:=diff(y(x),x) = 1/x^2; 
ic:=y(1) = 5; 
dsolve([ode,ic],y(x), singsol=all);
 

\[ y = -\frac {1}{x}+6 \]

✓ Mathematica. Time used: 0.002 (sec). Leaf size: 12

ode=D[y[x],x]==1/x^2; 
ic={y[1]==5}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to 6-\frac {1}{x} \]

✓ Sympy. Time used: 0.235 (sec). Leaf size: 7

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(Derivative(y(x), x) - 1/x**2,0) 
ics = {y(1): 5} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = 6 - \frac {1}{x} \]