Step-by-step explanation:
[tex] {4}^{x} = {2}^{n} \\ \\ \therefore \: {2}^{2x} = {2}^{n} \\ \\ \therefore \: 2x = n \\ \\ when \: x = 1 \implies \: n = 2 \times 1 = 2 \\ when \: x = 2 \implies \: n = 2 \times 2= 4[/tex]
