||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
x=var('x')
y=function('y',x)
de=diff(y,x,2)+2*diff(y,x)+y-exp(-x)
desolve(de,[y,x],ics=[0,-1,1])
}}}

/* code_ends */

 * '''Solution by''': 
   * <umesh>, <student>, <ait, pune>
   * <nitish>, <Student>, <ait, pune>