Arithmetic Progression
A sequence is known as an arithmetic progression (sequence) if the difference between the term and its predecessor always remains constant.
Prerequisite Knowledge
Understanding the concept of an arithmetic progression.
Materials Required
Coloured papers, a pair of scissors, fevicol, geometry box, sketch pens, drawing sheets.
(A) Consider a sequence 1, 4, 7, 10, 13.
(B) Consider a sequence 1, 4, 8, 10, 11.
Observation
We observe from fig(i) that the adjoining strips have a common difference in heights i.e. 3 cm and a ladder is formed in which the adjoining steps are constant. Hence it is an arithmetic progression. In fig (ii) the adjoining strips don’t have a common difference in heights and thus the adjoining steps of ladder are not constant. Hence it is not an arithmetic progression.
Learning Outcome
Students will learn the meaning of an arithmetic progression by relating it to an activity that involves visualisation.
Activity Time
Verify experimentally whether the following sequences are AP or not.
(i) 2, 4, 6, 8, 10
(ii) 3, 5, 6, 7, 11
(iii) 1, 5, 9, 13, 17
(iv)4, 7, 9, 10, 12
1. What is an arithmetic progression? |
2. How can I find the nth term of an arithmetic progression? |
3. What is the sum of an arithmetic progression? |
4. How can I determine if a given sequence is an arithmetic progression? |
5. Can an arithmetic progression have negative terms? |
|
Explore Courses for Class 10 exam
|