MAT 285 Study Guide - Midterm Guide: Cube Root, Intermediate Value Theorem, Kilogram
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MAT 285 Full Course Notes
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A function f is a rule that assigns to each element x in a set d exactly one element, called f (x), in a set e. We usually consider functions for which the sets d and e are sets of real numbers. The set d is called the domain of the function. The number f sxd is the value of f at x and is read (cid:862) f of x. (cid:863) The range of f is the set of all possible values of f sxd as x varies throughout the domain. A symbol that represents an arbitrary number in the domain of a function f is called an independent variable. A symbol that represents a number in the range of f is called a dependent variable. In example a, for instance, r is the independent variable and a is the dependent variable. It"s helpful to think of a function as a machine.
