# Rules on Derivatives â€“ Part 2

Published on: Tue Mar 09 2010

**Product Rule**
** **
Start by figuring out which is f(x) and which is g(x). Then find the derivatives for f(x) and g(x). Then write out the product rule in order f,g,h,j,kâ€¦ Etc however many functions are in the product. Then make one of the functions in each multiplication a derivative.
Some examples to practice:
**Quotient Rule**
So the quotient rule is a little funny. It has the g function squared on the bottom. I wonder what would happen if there are two functions on the bottom?
Quotient Rule Examples:
**Combining the Product Rule and the Quotient Rule**
First, do the Quotient Rule, then do the product rule.
**Chain Rule (Review for accuracy)**
The Chain rule is used for composite functions. IE: One function (inner) is passed to another function as an argument.
myFunction(anotherFunction());

So for the Chain rule, this would be
myFunctionDer(anotherFunction()) * anotherFunctionDer()