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# Chapter Summary

## 3.3 Chapter summary (EMA32)

Presentation: 2F85

• The general term is expressed as the $$n^{\text{th}}$$ term and is written as $${T}_{n}$$.

• We define the common difference $$d$$ of a sequence as the difference between any two successive terms, where $$d=T_{n}-T(n-1)$$

• We can work out a general formula for each number pattern and use it to determine any term in the pattern.