The various numbers occurring in a sequence are called its terms. The number of terms is called the length of the series
Terms of a sequence are denoted generally by a1,a2,a3,…..,ana1,a2,a3,…..,an etc., The subscripts denote the position of the term. We can choose any other letter to denote it
The nth term is the number at the nth position of the sequence and is denoted by an
The nth term is also called the general term of the sequence
A sequence can be regarded as a function whose domain is the set of natural numbers or some subset of it of the type {1, 2, 3…k}.
Many times is possible to express general term in terms of algebraic formula. But it may not be true in other cases. But we should be able to generate the terms of the sequence using some rules or theoretical scheme.
CBSE Revision Notes 