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

/* code_begins */

{{{x=var('x')
y=function('y',x)
s = desolve(diff(y,x)+3*y,y)
}}}

/* code_ends */

 * '''Solution by''': 
   * satish billade,lecturer,k.b.p.polytechnic
   * babasaheb dhanwate,lecturer,k.b.p.polytechnic