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Unformatted text preview: Lesson 20 Function: a connection between sets in which each element of the first set corresponds with exactly one element of the second set  the first set is called the domain and the second set is called the range Functions as equations: in terms of an equation, a function can thought of as a rule that states what operations are performed on the inputs  the domain is the set of inputs and the range is the set of outputs  in order for an equation to be a function, every input can have only one output  functions are represented by arbitrary letters, such as ¡ ¢¡ £ ¤ An example of a function is (¥) ¦ ¥ § . The name of this function is , the input of the function is ¥ , and the output (or function value) is (¥) , or ¥ § . The rule for this function is that everything that goes in gets squared, so if 2 goes in, 4 comes out, which means (¨) ¦ © . In this case, 2 is the input and 4 is the output....
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 Spring '08
 Algebra, Trigonometry, Equations, Sets, Expression, codomain, Graph of a function

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