函數(shù)概念-wenkub.com
2024-11-05 06:39 本頁面
【正文】 t any, then the domain is All real numbers x. ? If there are fractions, figure out what values would make the bottom equal zero and those are the values you can39。s find the domain of another one: ? ? 4?? xxhWe have to be careful what x39。t take the square root (or even root) of a negative number When you are asked to find the domain of a function, you can use any value for x as long as the value won39。 subtraction ? ? xxxg 22 ??Let39。 2020 by Shawna Haider A relation is a set of ordered pairs. {(2,3), (1,5), (4,2), (9,9), (0,6)} This is a relation The domain is the set of all x values in the relation {(The range is the set of all y values in the relation 1, )}domain = {1,0,2,4,9} These are the x values written in a set from smallest to largest range = {6,2,3,5,9} These are the y values written in a set from smallest to largest Domain (set of all x’s) Range (set of all y’s) 1 2 3 4 5 2 10 8 6 4 A relation assigns the x’s with y’s This relation can be written {(1,6), (2,2), (3,4), (4,8), (5,10)} A function f from set A to set B is a rule of correspondence that assigns to each element x in the set A exactly one element y in the set B. Whew! What did that say? Set A is the domain 1 2 3 4 5 Set B is the range 2 10 8 6 4 Must use all the x’s A function f fro set A to set B is a rule of cor espondence that assigns to each ele ent x in the set A ex ctlyele ent y in the set B. The x value can only be assigned to one y This is a function it meets our conditions Set A is the domain 1 2 3
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