If you differentiate a function f, n number of times, where n is a natural number and the derivative is always 0, what can you say about the original function f? A.
f is cubic function.
B.
f is a linear function.
C.
f is a constant function.
D.
f is a trigonometric function.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

the diameter is 16 cm. are you a teacher?

step-by-step explanation: