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28 Mar 2018

Arithmetic Progression

Arithmetic Progression



Topic -1 Sequence & Its Types




Quick Review –
Ø  Sequence : A Sequence is a collection of numbers arranged in a definite order according to some definite rule.
Example :
(i)  1, 4, 9, 16, ……(Collection of Perfect squares of Natural numbers)
(ii) 1, 3, 5, 7, …….(Collection of Positive odd Integers)
(iii) −2, − 4, − 6, …..(Collection of Negative even Integers)




Ø  Types of Sequence :
(a) Finite Sequence :

If the number of terms in a sequence is finite (Countable), i.e.,

 if there is an end of terms in the
     sequence, then it is called a finite sequence.

e.g., : 1, 2, 3, ….. 20.


(b)  Infinite Sequence

If the number of terms in a sequence is infinite, then it is called an infinite sequence.

      

 e.g., : 1, 3, 5, 7, ………..

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