Here are the main points that will be addressed in the videos. Please read these and think about them as you watch.
- A limit exists at a point if it is possible to approximate the value of a function or a hole in the function as accurately as desired
- Better approximations to the limit can be found by finding overestimates and underestimates which are closer to one another
- The error is less than or equal to the difference between an overestimate and an underestimate