Internal problem ID [5765]
Book: Differential Equations: Theory, Technique, and Practice by George Simmons, Steven Krantz.
McGraw-Hill NY. 2007. 1st Edition.
Section: Chapter 10. Systems of First-Order Equations. Section 10.2 Linear Systems. Page
380
Problem number: 5.
ODE order: 1.
ODE degree: 1.
Solve \begin {align*} x^{\prime }\relax (t )&=x \relax (t )+y \relax (t )\\ y^{\prime }\relax (t )&=y \relax (t ) \end {align*}
✓ Solution by Maple
Time used: 0.082 (sec). Leaf size: 20
dsolve([diff(x(t),t)=x(t)+y(t),diff(y(t),t)=y(t)],[x(t), y(t)], singsol=all)
\[ x \relax (t ) = \left (c_{2} t +c_{1}\right ) {\mathrm e}^{t} \] \[ y \relax (t ) = c_{2} {\mathrm e}^{t} \]
✓ Solution by Mathematica
Time used: 0.046 (sec). Leaf size: 25
DSolve[{x'[t]==x[t]+y[t],y'[t]==y[t]},{x[t],y[t]},t,IncludeSingularSolutions -> True]
\begin{align*} x(t)\to e^t (c_2 t+c_1) \\ y(t)\to c_2 e^t \\ \end{align*}