Dik fungsi f (x) = 3x+4 dan g (x) = 4x-5/2x+1, x /= -1/2 invers (fog) (x) adalah

Fungsi Komposisi

f(x) = 3x + 4
g(x) = (4x - 5)/(2x + 1)

(fog)(x)
= f(g(x))

= 3(4x - 5)/(2x + 1) + 4

= (3(4x - 5) + 4(2x + 1)) / (2x + 1)

= (12x - 15 + 8x + 4) / (2x + 1)

= (20x - 11) / (2x + 1)