To find the degree of the polynomial function \( f(x) = 7x(x-2)^2(x+4)^3 \), we need to determine the degree contributed by each factor.
- The factor \( 7x \) has a degree of 1.
- The factor \( (x-2)^2 \) has a degree of 2.
- The factor \( (x+4)^3 \) has a degree of 3.
Now, we can find the total degree by adding the degrees of each factor:
\[ \text{Total degree} = 1 + 2 + 3 = 6 \]
Thus, the degree of the polynomial \( f(x) \) is \( 6 \).
So the correct response is:
6