GCSE Maths (AQA)

435 videos | 33 hours

Advanced Geometric Sequences

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Algebra Sequences

Advanced Geometric Sequences

5:59 Geometric Sequences
Spec A24
Previous Geometric Sequences Next nth Term of an Arithmetic Sequence
  • Geometric sequences can be written with a third as a common ratio
  • The square root of 2 is an example of a common ratio in a geometric sequence
  • Multiplying by the square root of 2 gives the next term in the sequence
  • ERDs (Exponential Recursive Definitions) can be used to find the next terms in a geometric sequence
  • The first four terms of a geometric sequence with a common ratio of a third can be found by substituting values of n into the formula
  • The square root of a times the square root of a is equal to a
  • The common ratio can be found by dividing two successive terms in the sequence
  • Dividing the other two successive terms should give the same common ratio
  • Rationalizing the denominator involves multiplying both the top and bottom by the square root of 3
  • The common ratio can be confirmed by multiplying the second term by the same number as the first term

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.