Find `lim_(xrarr1) f(x)` where `f(x)= {[(x^2-1)/(x-1), x ne 1],[1, x=1]:}`

Explanation

To find the limit \( \lim_{x \to 1} f(x) \) where

\[
f(x) =
\begin{cases}
\frac{x^2 - 1}{x - 1} & \text{if } x \neq 1 \\
1 & \text{if } x = 1
\end{cases}
...