Dik F (x)= 2x dan g (x) = 5-x ...tentukan a) (fog) -1 (x) = dan b) (fog ) -1(1)=

f(x) = 2x dan g(x) = 5 - x

(fog)(x) = f(g(x))
(fog)(x) = 2(5 - x)
(fog)(x) = 10 - 2x

a). (fog)^-1(x)

Misal
y = 10 - 2x
2x = 10 - y
x = (10 - y)/2

(fog)^-1(x) = (10 - x)/2 atau 5 - x/2

b). (fog)^-1(1)

(fog)^-1(x) = (10 - x)/2
(fog)^-1(1) = (10 - 1)/2
(fog)^-1(1) = 9/2

Semoga membantu ^-^