1310-Notes-Sec-31-filled

1310-Notes-Sec-31-filled - Math 1310 Section 3.1 Functions...

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Math 1310 Class Notes – Section 3.1, Page 1 of 7 Math 1310 Section 3.1 Functions – Basic Ideas The rest of this course deals with functions. A function f is a rule that assigns to each element in a set A one and only one element of a set B . The set A is called the domain of f . Sets A and B are sets of real numbers. Set A Set B Functions are so important that we use a special notation when working with them. We’ll write f ( x ) to denote the value of function f at x . We read this as “ f of x .” The range of a function is all of the possible values of the function as x varies through the numbers in the domain. We can use letters other than f to denote a function, so you may see a function such as ). ( or ) ( ), ( x P x h x g Mappings We can show a relationship between two sets of numbers using a mapping . We can answer several questions using a mapping, such as: Does the mapping represent a function? If so, what is the domain of the function?
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1310-Notes-Sec-31-filled - Math 1310 Section 3.1 Functions...

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