Answer:
The answer to your question is: Domain (-∞, 3) U (3, ∞) or R - {3}
Step-by-step explanation:
Rational function is a function that is expressed as a fraction.
F(x) = [tex]\frac{P(x)}{Q(y)}[/tex]
In rational functions, Q(x) must be different from zero.
Then
x - 3 ≠ 0
x = 3
Finally
Domain will be R - {3}
or (-∞, 3) U (3, ∞)