## About the symbol Σ

The symbol Σ is used to denote summation. Often, Σ is not used alone, but represented in this manner:

The above means that we are going to sum the series from the first term (where r = 1) to the nth term, and each term takes the formula of f(r).

## Examples of summation

**Example 1: Evaluate the following:**

Solution:

**Example 2: Evaluate the following:**

Solution:

## Commonly used summation formula

## Sequences and series, AP& GP, and summation notes

- Sequences and series
- Arithmetic progression
- Geometric Progression
- Using the Graphic calculator (Ti84) for AP & GP Questions
- Summation: Introduction
- Finding summation using the graphic calculator
- Method of difference and summation

## All the notes for H2 A Level Math

Go here to find all the notes and resources for H2 A level Math.