For which pairs of functions is (f circle g) (x) = 12 x? f(x) = 3 – 4x and g(x) = 16x – 3 f(x) = 6x2 and g (x) = StartFraction 2 Over x EndFraction f (x) = StartRoot x EndRoot and g(x) = 144x f(x) = 4x and g(x) = 3x.