LOL.. Nashangaa ikiwa alileta mnyororo haswa kwa kuelezea kwa nini hiyo derivative inaitwa chain derivative ! Ilikuwa maelezo yasiyo sahihi hata hivyo!####[['chain derivative', 'Mathematical_Related_Concept', 'NEG'], ['NULL', 'Instructor', 'NEG'], ['derivative', 'Mathematical_Related_Concept', 'NEG']]