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I'd be happy to help you understand derivatives! A derivative measures the rate at which a function changes at a particular point. It's represented as f'(x) or df/dx. The basic formula for a derivative is: f'(x) = lim(h→0) [f(x+h) - f(x)]/h This is called the limit definition of a derivative. Would you like me to explain this further or give you some examples?