Question

Diketahui f(x) = X per X+1 dan g (x) = 2x-1. Maka (fog)-1(x) adalah...

Answer 1

Fog(x)
(2x-1) / (2x-1)+1
2x-1 / 2x

y= 2x-1 / 2x
y(2x) = 2x-1
y2x-2x =-1
x(2y-2)=-1
x=-1 / 2y-2
fog^-1(x) = -1/2y-2