## A brief introduction on method of difference

The method of difference can be used to find the sum of a series if the term can be expressed as a difference of two of more terms, and when we sum up these terms, most of the intermediate terms are cancelled.

## Example of method of difference

**Solution**

We’ll start off by expressing 1/[(r+1)(r+2)] as partial fractions.

Next to find the sum of a series using method of difference, you’ll need to list out the first few terms and the last few terms, and look at how the terms cancel off. The terms that are left is the sum of the series.

## 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.