- If the sequence or series is geometric then:
- If the sequence is quadratic then there is a constant second difference.
- Learners tend to struggle with the meaning of
*n*, and . Emphasise to them that the value of*n*represents the term’s position in the sequence, whereas represents the actual term with position*n*. - For geometric:
- Solving simultaneous equations is important and needs to be revised before the start of this chapter. Learners often struggle to understand the meaning of the sum to infinity of a convergent geometric series. Emphasise to them that the sum to infinity is the value approached as terms are added progressively.
- Applications of sequences and series in the real world are important for learners to focus on.

**Activity**

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