Solution
- The solution steps are given below:
[tex]\begin{gathered} f(x)=5^x \\ \text{ The exponential function of this form is always positive no matter the value of x} \\ \text{ Thus, the answer is:} \\ \\ \text{ ALL POSITIVE REAL NUMBERS} \end{gathered}[/tex]Final Answer
ALL POSITIVE REAL NUMBERS (OPTION C)