exists iff and is equal to their limit.
This has nothing to do with the value at .
If the left hand and the right hand limits are the same, regardless of the value of the function at that point, the limit is the value of the left and right hand limits.
Lets say that .
If , it doesn't have an affect on the value of the limit. Thus
Does this make sense?
With this, determine the correct answer.
--Chris