Does a limit exist on a graph at (-1,0) if the point

Click For Summary
A limit at (-1,0) exists if both the left-sided and right-sided limits are equal. In this case, a solid dot indicates that the function is defined at that point, but the absence of points or lines to the left suggests a left-sided limit does not exist. Therefore, since the left-sided limit is undefined and the right-sided limit exists, the overall limit at (-1,0) does not exist. The solid dot signifies continuity at that specific point, but continuity requires limits from both sides to be equal. Thus, the function is discontinuous at (-1,0) due to the lack of a left-sided limit.
Kendal
Messages
5
Reaction score
0
Does a limit exist on a graph at (-1,0) if the point is solid, and has a right sided limit, but there is nothing left of the point?

I understand that if the left sided limit and the right sided limit are different then it doesn't exist, but on my graph it shows a line coming from the right, stopping at (-1,0). where it stops, there is a solid dot indicating it's continuous (I'm assuming, correct me if I'm wrong), but the function stops there. There are no points or lines left of (-1,0)
 
Mathematics news on Phys.org
What's the problem? A right sided limit exists, and a left doesn't. The question of continuity from the left simply makes no sense.
 
The solid dot does not typically indicate continuity at the point (-1,0), rather, it indicates that the function's domain includes the point -1. On the other hand, a circle that is not solid at a point typically indicates that the function either 1) is not defined at that point or 2) has a discontinuity, i.e. you have to look elsewhere to find what the point is defined as in the function. Does that make sense in the context of the graph in your problem?
 
Here is a little puzzle from the book 100 Geometric Games by Pierre Berloquin. The side of a small square is one meter long and the side of a larger square one and a half meters long. One vertex of the large square is at the center of the small square. The side of the large square cuts two sides of the small square into one- third parts and two-thirds parts. What is the area where the squares overlap?

Similar threads

  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 8 ·
Replies
8
Views
5K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 31 ·
2
Replies
31
Views
6K
  • · Replies 7 ·
Replies
7
Views
2K