Hello. I'm not familiar with the notation

(0, 5( but I'd guess it means all numbers in between 0 and 5. In the US, we would write that as interval notation (0,5). If the 5 were included, then we would write (0,5].

Since you're a calculus student, let's start with these questions:

Is f defined for all numbers in between 0 and 5?

Can you find the limit of f, as x approaches 0 from the right?

Can you find the limit of f, as x approaches 5 from the left?

Also, please let us know if you've learned how to differentiate rational functions, like this one.