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

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{{{
#Prob 12 - Solving a 2nd order ODE with nonzero variable parameter k
var('x')
y=function('y',x)
k=2
de=diff(y,x,2)+2*k*diff(y,x)+(k^2+1/k^2)*y==0
desolve(de,y)
}}}

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 * '''Solution by''': 
   * <Aniket Basu>, <Mathematical Physicist>, <ISI Kolkata>