Lecture 4 (Calculus) Main Ideas of Calculus, Rates of Change, and Limits of Functions

Intuitively, the limit of f at a point a is described as:

1. A.The value f(a) computed by direct substitution
2. B.The value f gets arbitrarily close to as x approaches a
3. C.The average of f over a small interval surrounding a
4. D.The supremum of f over a neighborhood of the point a