Mohon bantuannya ya kak Dik:f (x) =2x+5 Dan g (x) =4-x Dit:(gof) (x)

f(x) = 2x + 5
g(x) = 4 - x

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

jawab

f(x)= 2x + 5
g(x)= 4 - x

gof(x) = g { f(x)}
= g {2x+ 5)
= 4 - (2x +5)
= 4 - 2x - 5
= -2x - 1