Answer:
A
Step-by-step explanation:
Given f(x) = [tex]\frac{1}{x}[/tex]
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.
denominator : x = 0 ← excluded value
domain : x ∈ R, x≠ 0
