**Calculus - Math**
https://www.math.net/calculus

In general terms, the derivative of a function is a measure of how rapidly a function's output changes relative to a change in the input value. The study of, and calculation of derivatives is a large part of early calculus. Derivatives are important because they have many real world applications in areas such as engineering, economics, health care,...

In general terms, the **derivative of a function** is** a measure of how rapidly a function's output changes relative to a change in the input value.** The study of, and calculation of derivatives is a large part of early calculus. Derivatives are important because they have many real world applications in areas such as engineering, economics, health care,...

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