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corey1234
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If it is the GRAPH of a function from A to B that is a subset of A x B, then why do websites say that a function f is a subset of A x B? Such as this website on page 7 of 22 http://www.mathdb.org/notes_download/elementary/algebra/ae_A1.pd
 one year ago
 one year ago
corey1234 Group Title
If it is the GRAPH of a function from A to B that is a subset of A x B, then why do websites say that a function f is a subset of A x B? Such as this website on page 7 of 22 http://www.mathdb.org/notes_download/elementary/algebra/ae_A1.pd
 one year ago
 one year ago

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watchmath Group TitleBest ResponseYou've already chosen the best response.0
well a function is a special relation. If a is related to b by a relation we write it as aRb. But to make it more convinient we just write it as (a,b) to say that aRb.
 one year ago

corey1234 Group TitleBest ResponseYou've already chosen the best response.0
So you are saying that a function is already a set of ordered pairs/?
 one year ago

watchmath Group TitleBest ResponseYou've already chosen the best response.0
strictly speaking functions is the rule that relates an ordered pairs. But if we are given the ordered pairs then we know how the rule behave.
 one year ago
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