Answer:
x^4 and 4
Step-by-step explanation:
The formula for finding the derivative of a function includes the following:
f(a+h) - f(a)
and in this case we have
f(4+h) - f(4) => f(4 + h)^4 - 4^4.
Comparing this to
f(a + h) - f(a), we see that a must be 4 and f(x) must be x^4.
