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Card 1 of 20

How can you test whether a sequence is arithmetic?

A

When an arithmetic sum is paired with its reverse, each pair equals 2a+(n−1)d\boxed{2a+(n-1)d}2a+(n−1)d​.

B

The number of terms must be a positive integer.

C

Subtract each term from the next; a constant difference means it is arithmetic.

D

Form two nnnth-term equations and solve them simultaneously.

Card 1 of 20

1.7.4 Arithmetic sequences and series (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /1.7.4 Arithmetic sequences and series (A-level only)

20 flashcards on AQA A Level Maths 1.7.4 Arithmetic sequences and series (A-level only): the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards