Respuesta :

MissPhiladelphia
The best and most correct answer among the choices provided by the question is the second and third choice because these two formula are the same.
Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.
Cricetus

Answer:

[tex]f(x)=()^-x[/tex]

Step-by-step explanation:

Let us understand the exponential function. Here the exponential function is given as under.

[tex]y=a^x[/tex]

Now this is an ever growing exponential function. It never decays unless we have

i) a<1

Hence in this case the function will decays

example

[tex]f(x)=(\frac{2}{3})^x[/tex]

or

[tex]f(x)=(-2)^x[/tex]

ii) x is a negative power.

Example

[tex]f(x)=2^(-4)[/tex]

Now in our problem , the second and third options are same. Hence both can be true. So our answer is b

b) [tex]f(x)=()^-x[/tex]