Answer:
x ∈ R, x ≠ 8
Step-by-step explanation:
The denominator of f(x) cannot be zero as this would make f(x) undefined.
Equating the denominator to zero and solving gives the value that x cannot be
8 - x = 0 ⇒ x = 8 ← excluded value
Domain : x ∈ R, x ≠ 8
