http://itsmyacademy.com/derivative-calculus/ complete list of video tutorials in Derivative Calculus.
Quotient rule of mathematics is very important rule in derivative calculus. Quotient rule in mathematics actually means the derivative of the function when one function is being divided my another function. or derivative of ratio of two function.quotient rule of derivative is simple right ! you should know the trick the trick to remember the quotient rule.
I hope you understand the quotient rule of derivative.