If f(x)=axf(x) = a^xf(x)=ax and f(2)=16f(2) = 16f(2)=16, f(3)=64f(3) = 64f(3)=64, what is the value of f(x+y)f(x+y)f(x+y) in terms of f(x)f(x)f(x) and f(y)f(y)f(y)?
f(x)+f(y)f(x) + f(y)f(x)+f(y)
f(x)⋅f(y)f(x) \cdot f(y)f(x)⋅f(y)
f(x)f(y)f(x)^{f(y)}f(x)f(y)
f(x)⋅y+f(y)⋅xf(x) \cdot y + f(y) \cdot xf(x)⋅y+f(y)⋅x