Definition:
A sequence (an) is convergence to a number l. If given excellon >0 there exist a positive integer m. Such that mod an - l < excellon for all n>=m. l is the limit of the sequence. And lim n->∞ an=l (or) (an) -> l.
Note:
(an) -> l if and only if given excellon>0 there exist a natural number m. Such that mod an-l< for all n>=m, All but a finite number of terms of the sequence le with in the interval (l-excellon, l+excellon).