Fungsi f (x): 2x+3÷x-5 , x#5 dan g (x): 3x+1 maka (gof)^-1 (x) adalah...

jawab

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

gof(x) =  3 { (2x + 3) /(x - 5) } +1

gof(x) = (6x + 9 + x -  5) /(x - 5) 

gof(x) = (7x + 4)/( x- 5)

(gof)⁻¹ ( x = (5x + 4)/(x - 7)