74.5.29 problem 29

Internal problem ID [15914]
Book : INTRODUCTORY DIFFERENTIAL EQUATIONS. Martha L. Abell, James P. Braselton. Fourth edition 2014. ElScAe. 2014
Section : Chapter 2. First Order Equations. Exercises 2.3, page 49
Problem number : 29
Date solved : Thursday, March 13, 2025 at 06:57:14 AM
CAS classification : [_separable]

\begin{align*} y^{\prime }+2 t y&=2 t \end{align*}

With initial conditions

\begin{align*} y \left (0\right )&=-1 \end{align*}

✓ Maple. Time used: 0.015 (sec). Leaf size: 14

ode:=diff(y(t),t)+2*t*y(t) = 2*t; 
ic:=y(0) = -1; 
dsolve([ode,ic],y(t), singsol=all);
 

\[ y = 1-2 \,{\mathrm e}^{-t^{2}} \]

✓ Mathematica. Time used: 0.056 (sec). Leaf size: 16

ode=D[y[t],t]+2*t*y[t]==2*t; 
ic={y[0]==-1}; 
DSolve[{ode,ic},y[t],t,IncludeSingularSolutions->True]
 

\[ y(t)\to 1-2 e^{-t^2} \]

✓ Sympy. Time used: 0.275 (sec). Leaf size: 10

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

\[ y{\left (t \right )} = 1 - 2 e^{- t^{2}} \]