1. Derivative
1. For a differentiable function , the new function created by associating each element of the domain with its derivative is called the derivative of the function . It is denoted by the symbols:
   
   That is,
   
   The process of finding the derivative of a function with respect to is called differentiation, and the method for doing so is called the differentiation method.
   
2. Derivative of the function ( is a natural number) and constant functions
1. If (where is a natural number), then:
   When ,
   When ,
2. If (where is a constant), then


2. Differentiation Rules
1. Differentiation rules for scalar multiples, sums, and differences of functions
   When two functions and are differentiable:
1. If (where is a constant), then
2. If , then
3. If , then


2. Differentiation rules for products of functions
   When three functions , , and are differentiable:
1. If , then
   
2. If , then