Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2wp/ Esercizi: http://www.khanacademy.org/exercise/domain_of_a_function Traduzione in Italiano del video Domain of a function http://www.youtube.com/watch?v=U-k5N1WPk4g&feature=player_embedded http://www.khanacademy.org/video/domain-of-a-function?playlist=Algebra Help us caption & translate this video! http://amara.org/v/B2wp/