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jake en-
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1. a: f(x)=(x-1)/3x+3 , b: f(x)= sqrt5x+9 , d: f(x)= (1/2)x^3 2. a: f^-1(x)=(x-8)^3 +2 3. b: this is a one to one function because there is no horizontal line that would intersect the graph of the function more than once. 4. a: domain - (-infinite, 0)U(0,