Question

[Function Composition] could someone help me with this answers or show work either is fine

Answer 1

-18

Explanation:

Given the functions

f(n) = 3n

We are to find fof(-2)

fof = f(f(n))

f(f(x)) = f(3n)

Replace n with 3n in f(n)

f(3n) =3 (3n)

f(3n) = 9n

Substitute n = -2

f(3n) = 9(-2)

f(3n) = -18

Hence fof(-2) = -18