Key learning points

1. Arithmetic sequences are not the only type of sequence.
2. In a geometric sequence, there is still a first term.
3. Instead of a common difference, there is a common multiplier.
4. This common multiplier is referred to as the common ratio.

Common misconception

Keywords

• Geometric sequence - A geometric sequence is a sequence with a constant multiplicative relationship between successive terms.

• Common ratio - A common ratio is a key feature of a geometric sequence. The constant multiplier between successive terms is called the common ratio.