What is a limit?
The limit at a given x-value is the height (y-value) that the function intends to reach, but never actually touches it.
The limit at a given x-value is the height (y-value) that the function intends to reach, but never actually touches it.
If you see x->c-, then x is approaching c from the left.
If you see x->c+, then x is approaching c from the right.
If you see x->c+, then x is approaching c from the right.
1. If the limit from the left does not equal the limit from the right, the limit at ‘c’ Does Not Exist.
2. When there is a vertical asymptote at x=c, the limit DNE.
3. If there is oscillation at x=c, the limit DNE.