Jika f(x) = 1 per x dan g(x) = 2x-1, maka (f•g) pangkat min 1(x)=...

jawab

f(x)= 1/x
g(x)  = 2 x -1

fog(x)=  f {g(x)} = f (2x - 1)
fog(x) = 1/ (2x -1)
y =  1/ (2x - 1)
2x - 1 = 1/y
2x = 1/y + 1
x = 1/2 (1/y  + 1)

(fog)⁻¹(x) =  1/2 ( 1/x  +1)