Lets see we have [tex]f(x)=\frac{3x}{x-1}[/tex] that means [tex]x\neq1[/tex] because then we would have division by zero in the denominator, so the domain is [tex]x\in\mathbb{R}-\{1\}[/tex].
Hope this helps.
Answer:
All real numbers except 1
Step-by-step explanation:
