Internal problem ID [13587]
Book: Ordinary Differential Equations. An introduction to the fundamentals. Kenneth B. Howell.
second edition. CRC Press. FL, USA. 2020
Section: Chapter 17. Second order Homogeneous equations with constant coefficients. Additional
exercises page 334
Problem number: 17.2 (c).
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _missing_x]]
\[ \boxed {y^{\prime \prime }-8 y^{\prime }+15 y=0} \] With initial conditions \begin {align*} [y \left (0\right ) = 5, y^{\prime }\left (0\right ) = 19] \end {align*}
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 17
dsolve([diff(y(x),x$2)-8*diff(y(x),x)+15*y(x)=0,y(0) = 5, D(y)(0) = 19],y(x), singsol=all)
\[ y \left (x \right ) = 2 \,{\mathrm e}^{5 x}+3 \,{\mathrm e}^{3 x} \]
✓ Solution by Mathematica
Time used: 0.014 (sec). Leaf size: 20
DSolve[{y''[x]-8*y'[x]+15*y[x]==0,{y[0]==5,y'[0]==19}},y[x],x,IncludeSingularSolutions -> True]
\[ y(x)\to e^{3 x} \left (2 e^{2 x}+3\right ) \]