Geometric Sequences


a geometric sequence or progression, is a sequence where each term is calculated by multiplying the previous term by a fixed number.

a geometric sequence has:

a first term, a,
a common ratio, r.

Key Skills

  • determine whether a sequence is geometric.
  • find the first term and the common ratio of a geometric sequence.
  • find the formula for the general term and use if to find specific terms of a geometric sequence.


geometric sequencegeometric progressionsequence, common ratiogeneral term