Diketahui f(x)=2x+1, g(x)=x+4 dan h(x)=5-x Rumus (g°h°f)^-1 (x) adalah

jawab


(gohof)(x) = g { hof)(x) 
= g {5 -(2x+1)}
= g (5-2x -1)
= g(4 - 2x)
=  4 - 2x + 4
= - 2x

(gohof)⁻¹(x) = - 1/2