1 of 3

ARITHMETIC

PROGRESSIONS

  • Introduction of sequence

2 of 3

1,

3,

5,

7,

- 45,

- 40,

- 35,

- 30,

9,

11,

13,

15,

List of Numbers

- 25,

- 20,

- 15,

Definite

pattern

Sequence :

7,

11,

20,

-1,

???

- 10, …

…

1st LIST

GUESS THE NEXT

NUMBERS

2nd LIST

GUESS THE NEXT

NUMBERS

3rd LIST

GUESS THE NEXT

NUMBERS

SEQUENCE IS A LIST OF NUMBERS

WHICH FOLLOW A DEFINITE PATTERN

NOT A

SEQUENCE

DOES NOT

FOLLOW PATTERN

In this chapter

we will deal only

with sequence

3 of 3

Sequence :

1,

3,

5,

7,

9,

11,

13,

15,

…

- 45,

- 40,

- 35,

- 30,

- 25,

- 20,

- 15,

- 10, …

List of Numbers

Each number in the

list is called a term

and is denoted by ‘a’

1st term a1

2nd term a2

3rd term a3

4th term a4