F(x) =2x÷x-1 dan g(x) =2x+1 jika (f•g)x Jika f•g -2

f (x) = 2x /(x - 1) dan g (x) = 2x + 1
f o g (-2) =
= f { g(-2) }
= f (2.-2 + 1)
= f (-4+1)
= f (-3)
= 2.-3/( -3-1)
= -6/-4
= 3/2