ika f(x) = 2x + 4, g(x) = 3x – 5, (g o f)(2) =

[tex] = g(f(x))(2) \\ = g(2x + 4) (2)\\ = (3( - 2) - 5)(2) \\ = ( - 11)(2) \\ = - 22[/tex]
dapat -2 itu dari 2x+4
2x = -4
x = -4 /2
maka nilai f(x) = -2

diketahui :
f(x) = 2x + 4
g(x) = 3x - 5

maka
f(2) = 2(2) + 4 = 8
g(8) = 3(8) - 5 = 19

jadi
(g o f)(2)
= g(f(2))
= g(8)
= 19