Question

How would you solve this?

Answer 1

f(x)=
`5^(-x)`

Explanation:

Not sure if this is what you're looking for but i hope this helps

Answer 2

f(x) = (1/5)^x

Explanation:

We have

x = 1, f(x) = 1/5

x = 0, f(x) = (1/5)^0 = 1

x = 2, f(x) = (1/5)^2 = 1/25

That means we have

f(x) = (1/5)^x