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1.7.5 Geometric sequences and series (A-level only)

How do you test whether a sequence is geometric?

A

u8=5(3)7=<strong>10935</strong>u_8=5(3)^7=<strong>10935</strong>u8​=5(3)7=<strong>10935</strong>

B

S∞=<strong>272</strong>S_\infty=<strong>\frac{27}{2}</strong>S∞​=<strong>227​</strong>

C

Check that consecutive-term ratios are constant.

D

10+2(61−0.6)=<strong>40 m</strong>10+2\left(\frac{6}{1-0.6}\right)=<strong>40\text{ m}</strong>10+2(1−0.66​)=<strong>40 m</strong>

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

  1. A Level
  2. /Maths
  3. /1.7.5 Geometric sequences and series (A-level only)

Flashcards for AQA A Level Maths 1.7.5 Geometric sequences and series (A-level only), covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 20 cards, matched to the AQA A Level Maths (7357) 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.