2xDx Dx2 Dx 2x Dx. The derivative of f x is mostly denoted by f x or dfdx and it is defined as follows. Remember that the limit definition of the derivative goes like this.
Displaystyle mathbf y t y_ 1 tldots y_ n t if the limit exists.
The process of finding a derivative is called differentiation. General Derivative Formulas. Evaluate lim x2 x 2-4x-2. F x y x 3 x 4 y 3 x 2 y 2 except that f 0 0 0.