Final answer:
The given equation represents a recurrence relation, neither arithmetic nor geometric.
Step-by-step explanation:
The given equation, f(n) = f(n-1) - 3, represents a recurrence relation. It is neither an arithmetic nor a geometric representation. In this recurrence relation, the value of f(n) is obtained by subtracting 3 from the previous term, f(n-1). To find the value of f(n) for a given n, we can use a recursive approach or iterate through the sequence.