題組內容

2. (10%) Sketch the graph of a function f(x) which has all of the following properties:

(a) \( \lim_{x\to 1^{+}}f(x) = \infty ,\lim_{x\to 1^{-}}f(x) = -\infty ,\lim_{x\to -\infty}f(x) = 0 \)