jika f(x) =2^x maka f(x-3) \ f(x-1)

= 2^(x-3) / 2^(x-1)
= 2^x.2^-3 / 2^x.2^-1
= 2^x.(1/2^3) / 2^x.(1/2^1)
= 2^x.(1/8) / 2^x.(1/2)
= (2^x/8) / (2^x/2)
= (2^x/8) × (2/2^x)
= 2/8
= 1/4