Final answer:
The explicit formula for the given equation f(n) = 7 - 3 is f(n) = 4.
Step-by-step explanation:
The equation f(n) = 7 - 3 represents a linear function where the output (f(n)) is determined by subtracting 3 from 7. To find the explicit formula, we need to express f(n) in terms of the input variable n. In this case, the explicit formula is f(n) = 4. It is a constant function, meaning the output is always 4 regardless of the value of n.