Introduction to Derivatives
www.mathsisfun.com › calculus › derivativesf’ (x) = lim Δx→0 f (x+Δx) − f (x) Δx. "The derivative of f equals. the limit as Δx goes to zero of f (x+Δx) - f (x) over Δx ". Or sometimes the derivative is written like this (explained on Derivatives as dy/dx ): dy dx = f (x+dx) − f (x) dx. The process of finding a derivative is called "differentiation".