Internal problem ID [313]
Book: Differential equations and linear algebra, 4th ed., Edwards and Penney
Section: Section 7.2, Matrices and Linear systems. Page 384
Problem number: problem 13.
ODE order: 1.
ODE degree: 1.
Solve \begin {align*} x_{1}^{\prime }\relax (t )&=6 x_{1}\relax (t )\\ x_{2}^{\prime }\relax (t )&=-3 x_{1}\relax (t )-x_{2}\relax (t ) \end {align*}
✓ Solution by Maple
Time used: 0.013 (sec). Leaf size: 28
dsolve([diff(x__1(t),t)=4*x__1(t)+2*x__1(t),diff(x__2(t),t)=-3*x__1(t)-x__2(t)],[x__1(t), x__2(t)], singsol=all)
\[ x_{1}\relax (t ) = -\frac {7 c_{2} {\mathrm e}^{6 t}}{3} \] \[ x_{2}\relax (t ) = {\mathrm e}^{-t} c_{1}+c_{2} {\mathrm e}^{6 t} \]
✓ Solution by Mathematica
Time used: 0.005 (sec). Leaf size: 56
DSolve[{x1'[t]==4*x1[t]+2*x2[t],x2'[t]==-3*x1[t]-x2[t]},{x1[t],x2[t]},t,IncludeSingularSolutions -> True]
\begin{align*} \text {x1}(t)\to e^t \left (c_1 \left (3 e^t-2\right )+2 c_2 \left (e^t-1\right )\right ) \\ \text {x2}(t)\to e^t \left (c_2 \left (3-2 e^t\right )-3 c_1 \left (e^t-1\right )\right ) \\ \end{align*}