he tells you that t is nx^(n-1) which is a way to find the deri\vative. there are other rules i dont know why he wouldnt go over it.####[['NULL', 'Instructor', 'NEU'], ['deri\\vative', 'Mathematical_Related_Concept', 'NEU'], ['t', 'Mathematical_Related_Concept', 'NEU'], ['nx^(n-1)', 'Mathematical_Related_Concept', 'NEU'], ['NULL', 'Mathematical_Related_Concept', 'NEU']]