Book Calculus by Thomas/Finney, 9th Edition, Page 109
Derivates is one of the most important concept in calculus. It measures the rate at which a function changes. It is defined actually as the limit of secant slopes which is the slope of curve at a point.
Derivative of the funtion $f$ with respect to variable $x$ is given by function $fâ$ as,
Derivative of a function can be denoted in various ways.
The steps involved in calculating derivatives is called Differentiation.
Example derivate of $f(x) = \frac{x}{x-1}$,
Differentiation rules.
Second and Higher Order Derivatives.
Rates of Change â rates at which things change in the real world (page 131)
For more Book Calculus by Thomas/Finney, 9th Edition, Page 109-187