Question

Could you help me with this is from apex please

Answer 1

The function is

`f(x)=(1)/(9)9^x=9^(-1)\cdot9^x=9^(x-1)`

To get f(3), set x=3 and solve, as follows:

`f(x=3)=9^(3-1)=9^2=81`

Then, the answer is 81, option A