In: Math
For the following exercises, consider the function shown in Figure 17.
At what x-coordinates is the function discontinuous?
A function f (x) is continuous at x = a, only if it satisfies all the three following conditions:
• Condition 1: f (a) exists.
• Condition 2: limx→af(x) exists
• Condition 3: limx→af(x) = f(a)
Consider the graph provided in the textbook:
At x = -1, the limit does not exist, so the function is discontinuous at x = -1.
At x = 1, f(1) does not exist, so the function is discontinuous at x = 1.
At x = 2, the limit does not exist due to the vertical asymptote, so the function is discontinuous at x = 2.
So, the function is discontinuous at points x = -1, x = 1 and x = 2.