Answer:
\(f(x)=()^-x\)
Step-by-step explanation:
Let us understand the exponential function. Here the exponential function is given as under.
\(y=a^x\)
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
\(f(x)=(\frac{2}{3})^x\)
or
\(f(x)=(-2)^x\)
ii) x is a negative power.
Example
\(f(x)=2^(-4)\)
Now in our problem , the second and third options are same. Hence both can be true. So our answer is b
b) \(f(x)=()^-x\)
