3. Diketahui fungsi f (x) = 3x-2 dan fog (x) = 15x+1 Rumus fungsi g (x) adalah …

Fungsi Komposisi

3.

f(x) = 3x – 2

fog (x) = 15x + 1

3 g(x) – 2 = 15x + 1

3 g(x) = 15x + 3

g(x) = (15x + 3)/3

g(x) = 5x + 1

4.

g(x) = 2x – 1

(fog)(x) = 2x + 3

f(2x – 1) = (2x – 1) + 4

f(x) = x + 4