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Vocab and formulae for Pearson Edexcel year 2 Textbook Pure Mathematics.
nth term for arithmetic sequence.
u = a + (n-1)d
where d is the common difference, a is the first term, and n is the place of the term in the sequence.
nth term for geometric sequence.
u = ar^(n-1)
where r is the common ratio, a is the first term, and n is the place of the term in the sequence.
What is l (L) in the arithmetic series equation?
the last term
What is a sequence?
A list of terms.
What is a series?
The sum of the terms of a sequence.
What is another word for (arithmetic) sequence?
(arithmetic) progression
Note 
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