![A curve and its tangent at apoint](https://georgepavlides.info/wp-content/uploads/2016/10/2000px-Tangent_to_a_curve.svg_-1.png)
Formally stated, the derivative of a function of the form
with k a constant and with respect to an independent variable x, is simply,
I find this to be extremely handy in all cases. Consider the simple case in which,
In the same way,
In a more complex example,
In an even more complex example,
How about this one?
Unbelievably powerful!