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The Limit Definition of Derivatives! - Calculus! - ThatTutorGuy.com - JJtheTutor
Sorry about the audio... By the time we found out, we already had thousands of views, and there's no way to replace the file without youtube thinking it's a new video. The full-audio video is free at http://www.thattutorguy.com/calculus/limit-definition-of-derivative/