Math  /  Algebra

QuestionGiven functions f(x)=3x+1f(x)=3x+1 and g(x)=5x9g(x)=5x-9, find values where fg\frac{f}{g} is undefined: 3-3, 13\frac{1}{3}, 95\frac{9}{5}, 59\frac{5}{9}.

Studdy Solution
Let's check the other given values of xx to see if they make the denominator zero.
For x=3x = -3, g(x)=5(3)9=159=240g(x) =5(-3) -9 = -15 -9 = -24 \neq0
For x=13x = \frac{1}{3}, g(x)=5(13)9=539=2230g(x) =5(\frac{1}{3}) -9 = \frac{5}{3} -9 = -\frac{22}{3} \neq0
For x=59x = \frac{5}{9}, g(x)=5(59)9=2599=5690g(x) =5(\frac{5}{9}) -9 = \frac{25}{9} -9 = -\frac{56}{9} \neq0
So, the function fg\frac{f}{g} is defined for x=3x = -3, x=13x = \frac{1}{3}, and x=59x = \frac{5}{9}.
Therefore, the only value of xx for which fg\frac{f}{g} is undefined is x=95x = \frac{9}{5}.

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