One-sided limit — Precalculus, what it means and where it is taught
The value approached from the left, or from the right, alone.
Taught in Precalculus.
Where it is taught
Practise this idea
1 question in the course bank use One-sided limit, in Limits & Continuity.
Problem 1
For that same function, does limx → 1 f(x) exist?
- No — the two sides disagree
- Yes, it is 2
- Yes, it is 6
- Yes, it is 4
Worked answer
No — the two sides disagree
2 from the left and 6 from the right
They must agree for the limit to exist