Informal Definition of continuity:
f(x) is continuous on the interval [a,b]
iff you can draw the function from a to b without
lifting your pencil
Informal definition of limit:
Formal Definition of Continuity:
f(x) is continuous on the interval [a, b] iff
Formal Definition of Limit:
Hopefully your browser
will be able to detect all the symbols in this math text script. Here it is in
English.
The limit as x approaches a of f(x) is L iff and only if for all epsilon
greater than zero there exists a delta greater than zero such that the
magnitude of the distance between x
and a being less than delta will force the distance between f(x)
and L to be less than epsilon.