How do i solve lim f(x) as x approaches 1?

Question

i understand how to solve them when f(x) is equal to an equation, but when there's no equation i'm lost.

Answer 1

I think you just want to say f(1)? If you have an equation written what are you doing? You're just plugging in for x = 1 if it's not an undefined limit in which case you use other methods of solution. So thus given nothing other than f(x), you can only really say it's equal to f(1).  

Answer 2

if you know that f is continuous at x = 1 then lim f(x) = f ( lim x)