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Unformatted text preview: 31: FunctionsA function from set X into set Y is a relation that associates with each element of X exactly one element of Y; however, one element of Y may be associated with more than one element of X. The domain is the set of all possible X elements; the range is the set of all possible Y elements. A function f(x) tells us what to do with the independent variable (x) in order to obtain the dependent variable (y).Determine whether the relation represents a function:(1) {(2, 5), (1, 3), (3, 5), (4, 12)}(2) x2 – y + 1 = 0YesDomain: {2, 1, 3, 4}Range: {5, 3, 12}(3) x2 + y2 = 4[4] y = 54x±Find the following values for each function: a. f (3)b. f(5)c. f(x3)[5] If f(x) =x2 + 3x  5[6] If (292x  1f x =x + 4If f(x) = 2x2 + 3x – 1, find: [7] f(x)[8] f(x)[9] x if f(x) = 8Find the domain and range of the following functions:...
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 Fall '08
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