Respuesta :
The domain of the function is the set of input or argument values for which the function is real and defined.
[tex] 13-x=0
x=13 [/tex]
So the function is not defined when x=13.
thus the domain of the function is [tex] x\neq 13\\ [/tex]
In Interval notation, [tex] (-\infty, 13)U(13, \infty) [/tex]
