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3.3.3 Sequences and series (A-level only)

Card 1 of 24

Do the symbols 3,7,11,15,…3, 7, 11, 15,\ldots3,7,11,15,… represent a sequence or a series?

A

The standard finite sum ∑r=1nr\displaystyle\sum_{r=1}^{n}rr=1∑n​r equals n(n+1)2\boxed{\displaystyle\frac{n(n+1)}{2}}2n(n+1)​​.

B

A sequence, because the terms are separated by commas.

C

The upper limit is the final index, and 3r+1=313r+1=313r+1=31 gives r=10r=10r=10.

D

Add the specified terms.

Card 1 of 24

3.3.3 Sequences and series (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /3.3.3 Sequences and series (A-level only)

24 flashcards on CCEA A Level Maths 3.3.3 Sequences and series (A-level only): the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.

Flashcards