6. Progression

A progression is a sequence of numbers arranged according to a specific rule or pattern. In this chapter, students mainly study Arithmetic Progression (AP), where the difference between consecutive terms remains constant. This constant difference is called the common difference. Examples of arithmetic progressions include sequences like 2, 5, 8, 11, … where each term increases by the same amount.

 

The chapter explains how to find the nth term of an AP and the sum of the first n terms using mathematical formulas. These concepts help students understand patterns and solve many practical problems involving regular increases or decreases, such as calculating savings, arranging objects, or analyzing number patterns. Understanding progressions builds strong logical thinking and is useful in many areas of mathematics and real-life situations.