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What feature confirms that a sequence is arithmetic?
A
When the first and last terms are known, use Sn=n2(a+l)\boxed{S_n=\frac{n}{2}(a+l)}Sn=2n(a+l).
B
Its terms do not approach zero.
C
Consecutive terms have a constant difference.
D
If lll is the last term, then l=a+(n−1)d\boxed{l=a+(n-1)d}l=a+(n−1)d.
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1.6.12 Arithmetic sequences and series (A-level only) Flashcards
21 flashcards on OCR (MEI) A Level Maths 1.6.12 Arithmetic sequences and series (A-level only): the key formulae, methods and definitions you need to recall for Component 01, Component 02 and Component 03.