CAIE IGCSE Mathematics Extended E2.7 Sequences Question Bank

Practise finding nth-term formulae for geometric sequences by identifying the common ratio and matching the first listed term.

Syllabus
2028–2030
Topic
E2.7
Level
Extended

Exam points

  • find the common ratio from consecutive terms before forming u_n
  • adjust the power of n so formulae like 3^(n-1) match the first term

Covered syllabus points

E2.7.1 Continue sequencesE2.7.2 Recognise sequence patternsE2.7.3 Find and use the nth term

E2.7 Sequences question 1

[Maximum number: 2]

These are the first five terms of a different sequence.
1, 3, 9, 27, 81
Find the nth term of this sequence.

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