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

/* code_begins */

{{{
x=var('x')
lamb=var('lamb')
W=det(matrix([[exp(lamb*x),x*exp(lamb*x)],[lamb*exp(lamb*x),lamb*x*exp(lamb*x)+exp(lamb*x)]]))        
W.simplify_rational()}}}

/* code_ends */

 * '''Solution by''': 
   * namdev,teaching,RGIT
   * dilip,teaching,RGIT