18.12 problem 18

Internal problem ID [14839]

Book: INTRODUCTORY DIFFERENTIAL EQUATIONS. Martha L. Abell, James P. Braselton. Fourth edition 2014. ElScAe. 2014
Section: Chapter 4. Higher Order Equations. Chapter 4 review exercises, page 219
Problem number: 18.
ODE order: 2.
ODE degree: 1.

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

\[ \boxed {15 y^{\prime \prime }-11 y^{\prime }+2 y=0} \]

Solution by Maple

Time used: 0.016 (sec). Leaf size: 17

dsolve(15*diff(y(x),x$2)-11*diff(y(x),x)+2*y(x)=0,y(x), singsol=all)
 

\[ y \left (x \right ) = c_{1} {\mathrm e}^{\frac {x}{3}}+c_{2} {\mathrm e}^{\frac {2 x}{5}} \]

Solution by Mathematica

Time used: 0.013 (sec). Leaf size: 26

DSolve[15*y''[x]-11*y'[x]+2*y[x]==0,y[x],x,IncludeSingularSolutions -> True]
 

\[ y(x)\to c_1 e^{2 x/5}+c_2 e^{x/3} \]