Science:Math Exam Resources/Courses/MATH104/December 2016/Question 08 (b)/Hint 1

Recall that $x\to 1^{-}$ means that $x$ approaches to $1$ from the left. In other words, we consider $x$ which is close to $1$ and satisfies $x<1$.

Find the piece of function $f$ which lies on the region $x<1$ and determine what value $f(x)$ approaches as $x\to 1^{-}$, and from which direction (left/right) does $f(x)$ approach this value .