At a glance
2
Occurrences
questions
2
Years
2
Papers
2
Worked
100%
When this method shows up
Years in which at least one question on this paper triggers the method.
Other top methods in Combinatorics & Binomial
- Recognise a polynomial or rational expression as a known binomial or geometric series, then read off a coefficient×2
- Track magnitude with the ratio of consecutive terms or with iterated logarithms×2
- Equate coefficients of on two sides of an algebraic identity to prove a binomial sum×2
- Set up a recurrence by classifying cases, then prove the closed form by induction×1
See the worked examples
Open this method in the 3-panel methods app to see the demonstration, every linked past-paper question, and how to attack it.
Open method in the STEP appTry a method on a real paper
Open the STEP methods app to see worked examples, linked questions and the 3-panel revision view.
Open STEP methods