I know what you’re thinking – “Did he fire six shots or only five?” Well, to tell you the truth, in all this excitement, I’ve kinda lost track myself. But, being as this is a .44 Magnum, the most powerful handgun in the world and would blow your head clean off, you’ve got to ask yourself one question: “Do I feel lucky?” Well, do you, punk?
Clint Eastwood, Dirty Harry
- Derivative (Wikipedia)
In mathematics, the derivative shows the sensitivity of change of a function’s output with respect to the input. Derivatives are a fundamental tool of calculus. For example, the derivative of the position of a moving object with respect to time is the object’s velocity: this measures how quickly the position of the object changes when time advances.