What Is The Type Of Discontinuity Function?

You will discover what makes a function discontinuous in this session. You'll also look at different forms of discontinuity to help you better comprehend the idea.

What Is a Discontinuous Function?

You've probably heard of a continuous function, which is a graph function with a continuous curve. You never pull your pencil up until the function is completed when you put it down to sketch it. The polar opposite of a continuous function would be described as a discontinuous function. It's a function that contains points on a graph that are separated from one another, in other words it isn't a continuous curve. you must lift your pencil up at least one point, before you may finish drawing a discontinuous function.

If you ever encounter a function that has any type of break in it, you know it's discontinuous. You can see how the function continues with a break in the function we have here.


The discontinuous function comes to a halt at x = 1 and y = 2, then resumes where x = 1 and y = 4.

Properties of Continuity Function

Discontinuous functions have a few unique features, two of which are particularly important: To begin with, the function always breaks off at one or more places. Discontinuous functions, as we've seen, have places where the graph just stops and resumes someplace else. Second, for most discontinuous functions, but not all, the function's limit at a point of discontinuity is undefined. Although the limit may be specified, it is nevertheless regarded as discontinuous. Let's look at some typical forms of discontinuous functions now.

Types of Discontinuities

Jump, endless, removable, endpoint, and mixed discontinuities are the different types of discontinuities. The existence of the limit characterises removable discontinuities. Redefining the function can "repair" removable discontinuities. The fact that the limit does not exist distinguishes the other forms of discontinuities. Specifically,

  • Jump Discontinuities: There are two one-sided limits, but their values are different.
  • Both one-sided limits are unlimited, resulting in infinite discontinuities.
  • Endpoint Discontinuities: There is only one one-sided limit.
  • Mixed: in this case, at least one of the one-sided limitations does not exist.

Removable Discontinuity

A removable discontinuity, often known as a hole, is a specific form of discontinuity. A removable discontinuity, often known as a hole, is a missing value in a function when it is graphed. Everything else appears to be a graph that never ends. We will have eliminated the discontinuity by defining that missing point. A little circle at the place of discontinuity marks the removable discontinuity on the graph.

Jump Discontinuities

Even if the hole is closed up, jump discontinuities exist when a function has two endpoints that do not meet. Only one of the end points may be filled to satisfy the vertical line test and ensure that the graph is actually that of a function. An example of a function with a jump discontinuity is shown below.

Infinite Discontinuities

When a function has a vertical asymptote on one or both sides, infinite discontinuities arise. At x=a, this may be seen in the graph of the function below. As x approaches a, the function's arrows imply that it will grow indefinitely big. The limit does not exist since the function does not reach a certain finite value. This is a never-ending break.

Endpoint Discontinuities

The limit cannot exist at an endpoint when a function is defined on an interval with a closed endpoint. This is due to the fact that when x approaches from both sides, the limit must check the function values.

Mixed Discontinuities

Observe the graphs below, you can notice that at x=3, the function is clearly discontinuous. The function has an endless discontinuity on the left, but the discontinuity is removable on the right. We call this a mixed discontinuity since there are several reasons for the discontinuity.


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