1.6 problem Problem 6

Internal problem ID [12117]

Book: Differential equations and the calculus of variations by L. ElSGOLTS. MIR PUBLISHERS, MOSCOW, Third printing 1977.
Section: Chapter 1, First-Order Differential Equations. Problems page 88
Problem number: Problem 6.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_linear, `class A`]]

\[ \boxed {x^{\prime }+3 x={\mathrm e}^{2 t}} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 18

dsolve(diff(x(t),t)+3*x(t)=exp(2*t),x(t), singsol=all)
 

\[ x \left (t \right ) = \frac {\left ({\mathrm e}^{5 t}+5 c_{1} \right ) {\mathrm e}^{-3 t}}{5} \]

Solution by Mathematica

Time used: 0.07 (sec). Leaf size: 23

DSolve[x'[t]+3*x[t]==Exp[2*t],x[t],t,IncludeSingularSolutions -> True]
 

\[ x(t)\to \frac {e^{2 t}}{5}+c_1 e^{-3 t} \]