jika g(x) = 4x + 2,nilai g-1 (½) =?

g(x) = 4x + 2
y = 4x + 2
4x = y - 2
x = y/4 - 2/4
jadi 
g⁻¹(x) = x/4 - 1/2

g⁻¹(1/2) = (1/2)/4 - 1/2
g⁻¹(1/2) = (1/8) - 4/8
g⁻¹(1/2) = -3/8