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

/* code_begins */

{{{
#Kreyszig Problemset 12.8 problem 5
a=ComplexNumber(-5,0)
a.log()
}}}

/* code_ends */

 * '''Solution by''': 
   * <Grishalda>, <Lecturer>, <St. Francis Institute of Technology>
   * <Your Name>, <Profen>, <Organization>