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1.6.14 Geometric sequences and series (A-level only)

How does a sequence differ from a series?

A
  • A sequence is an ordered list of terms.
  • A series is the sum of those terms.
B

An infinite geometric series converges when ∣r∣<1\boxed{|r|<1}∣r∣<1​, in which case S∞=a1−rS_\infty=\frac{a}{1-r}S∞​=1−ra​.

C

Sn−rSn=a−arnS_n-rS_n=a-ar^nSn​−rSn​=a−arn

D

u8=5(37)=10935u_8=5(3^7)=10935u8​=5(37)=10935

1.6.14 Geometric sequences and series (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /1.6.14 Geometric sequences and series (A-level only)

Flashcards for OCR (MEI) A Level Maths 1.6.14 Geometric sequences and series (A-level only), covering the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03. 24 cards, matched to the OCR (MEI) A Level Maths (H640) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.