Diketahui F(x) = -2x-9 dan g(x) = 20-3x per 2 ditanya (gof)^-1(2)? Tolong dijawab secepatnya yah

jawab

f(x) = -2x - 9
g(x)=  (20-3x)/2

(gof)(x) = g {f(x)} = g(-2x- 9)
(gof)(x) = { 20 - 3(-2x-9)} /2
gof(x) = {20 +6x + 27}/2
gof(x) = (6x + 47)/2

(gof)⁻¹ {(6x+47)/2) = x
(gof)⁻¹(2) =..

(6x + 47)/2 = 2
6x + 47 = 4
6x = 43
x = 43/6

(gof)⁻¹(2) = 43/6