25.1 problem 3(a)

Internal problem ID [6505]

Book: Differential Equations: Theory, Technique, and Practice by George Simmons, Steven Krantz. McGraw-Hill NY. 2007. 1st Edition.
Section: Chapter 7. Laplace Transforms. Section 7.5 Problesm for review and discovery. Section A, Drill exercises. Page 309
Problem number: 3(a).
ODE order: 2.
ODE degree: 1.

CAS Maple gives this as type [[_2nd_order, _missing_x]]

\[ \boxed {y^{\prime \prime }+3 y^{\prime }-5 y=1} \] With initial conditions \begin {align*} [y \left (0\right ) = 0, y^{\prime }\left (0\right ) = 1] \end {align*}

Solution by Maple

Time used: 0.078 (sec). Leaf size: 40

dsolve([diff(y(t),t$2)+3*diff(y(t),t)-5*y(t)=1,y(0) = 0, D(y)(0) = 1],y(t), singsol=all)
 

\[ y \left (t \right ) = \frac {\left (29+13 \sqrt {29}\right ) {\mathrm e}^{\frac {\left (-3+\sqrt {29}\right ) t}{2}}}{290}-\frac {1}{5}+\frac {\left (29-13 \sqrt {29}\right ) {\mathrm e}^{-\frac {\left (3+\sqrt {29}\right ) t}{2}}}{290} \]

Solution by Mathematica

Time used: 0.026 (sec). Leaf size: 67

DSolve[{y''[t]+3*y'[t]-5*y[t]==1,{y[0]==0,y'[0]==1}},y[t],t,IncludeSingularSolutions -> True]
 

\[ y(t)\to \frac {1}{290} e^{-\frac {1}{2} \left (3+\sqrt {29}\right ) t} \left (\left (29+13 \sqrt {29}\right ) e^{\sqrt {29} t}-58 e^{\frac {1}{2} \left (3+\sqrt {29}\right ) t}+29-13 \sqrt {29}\right ) \]