First Name =Romualda Last Name =Gavshina Title = Institution =Rigas 92. vidusskola Street Address =Ulbrokas 3. City =Riga State =Latvia Zip Code =00371 Telephone =28318250 FAX =67247473 E-mail =jea86@mail.ru URL = Title of talk =Problems of functional extrema. This research work has dedicated how to use and how to find the most and the least meanings of function. Don\'t use derivatives of function, which have some questions of theoretical character.