This review page contains a summary of differentiation rules, that is, of rules for computing the derivative of a function. If is a function, its first derivative is denoted by .
Table of contents
If is a constant functionwhere , then its first derivative is
If is a power functionthen its first derivative iswhere is a constant.
If is the natural logarithm of , that is,then its first derivative is
If is the logarithm to base of , that is,then its first derivative is(remember that ).
If is the exponential functionthen its first derivative is
If the exponential function does not have the natural base , but another positive base , that is, ifthen its first derivative is(remember that ).
If and are two functions and are two constants, then
In other words, the derivative of a linear combination is equal to the linear combinations of the derivatives. This property is called "linearity of the derivative".
Two special cases of this rule are
If and are two functions, then the derivative of their product is
If and are two functions, then the derivative of their composition is
What does this chain rule mean in practice? It means that first you need to compute the derivative of :Then, you substitute with :Finally, you multiply it by the derivative of :
The trigonometric functions have the following derivatives:while the inverse trigonometric functions have the following derivatives:
If is a function with derivativethen its inverse has derivative
Please cite as:
Taboga, Marco (2021). "Derivatives - Review", Lectures on probability theory and mathematical statistics. Kindle Direct Publishing. Online appendix. https://www.statlect.com/mathematical-tools/derivatives-review.
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