Jika g(x) = 5pangkat 2x , nilai g^-1(25) =….

Y = 5²ˣ, gunakan sifat log : ᵃlog c = b , aᵇ = c

2x = ⁵log y  → x = ⁵log y / 2 →(⁵log x)/2
g⁻¹(25) = (⁵log 25)/2 = 2/2 = 1