Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2wq/ Traduzione in Italiano del video Proof: log a + log b = log ab http://www.youtube.com/watch?v=FP2arCfAfBY http://www.khanacademy.org/video/proof--log-a---log-b---log-ab?playlist=Algebra Help us caption & translate this video! http://amara.org/v/B2wq/